Statistics and Probability questions and answers in July 2020

The quality-control inspector of a production plant will reject a batch of syringes if two or more defective syringes are found in a random sample of eight syringes taken from the batch. Suppose the...
I am struggling with this question: Football teams have the option of trying to score either 1 or 2 extra points after a touchdown. They get 1 point by kicking the ball through the goal posts or 2 poi...
please solve for critical and p-value rounding to 3 pass the decimal thank you Census data for a city indicate that 32.2% of the under-18 population is white, 25.6% black, 30.2% Latino, 9.6% Asian, an...
I'm not sure how to answer these questions. The wording confuses me, can I get help clarifying these questions please! Suppose another sample of 50 fish is drawn from the lake. These 50 fish have a me...
How do i solve the attached question analytically and in python s bot
Suppose two researchers are conducting studies about animal behavior, and they both have the same null hypothesis and the same alternative hypothesis as each other. Also, suppose that Researcher A's s...
In a regression analysis the standard error of b2 was found to be 0.150. The value os the t-statistic used to test H0: β 2 = 0 was found to be -14.03. What is the value of b2? 
Given  P ( A ) = 0.4 and  P ( B ) = 0.2, do the following. (For each answer, enter a number.) (a) If  A  and  B  are independent events, compute  P ( A  and  B ).   (b) If  P ( A  |?...
Please help with the following G INSTITUTION CITY STATE TYPE COST/YR ($) #4: Do the following 2 Southern Utah University Cedar City UT Public 14434 Madison Area Technical College Madison WI Public 105...
To compute the 95% confidence interval for the mean satisfication index of papulation,what is the z value
Please use R or Python to answer the following question.
Creating and Interpreting a Demographic Table Overview The  baseline   demographic table plays an important role in reporting study results. It summarizes key characteristics of participants numeric...
Thank you very very much! : ) Let X represent the full height of a certain species of tree. Assume that X has a normal probability distribution with mean 204.1 ft and standard deviation 63.7 ft. You i...
Your professor tells you that if you score an 85 or better on your midterm exam, then you have a 90% chance of getting an A for the course. You think you have only a 50% chance of scoring 85 or better...
Thank you so much for your assistance! A population of values has a normal distribution with p = 182.8 and a = 25.3. You intend to draw a random sample of size n = 112. What is the mean of the distrib...
12- I need help with: Nine subjects were used in an experiment to determine if exposure to carbon monoxide has an impact on breathing capability. The data were collected by personnel in the Health and...
11- I need help with: Consider an in-control process with mean a = 25 and o = 1.0. Suppose that subgroups of size 5 are used with control limits # + 30/vn, and centerline at w. Suppose that a shift oc...
Need help with probability and normal distribution. Please show work w cf_u09a1_paper_template w week 4 homework stat.docx ex + Q - @ Home Insert Page Layout References Review View Section Tools Q Cli...
10- I need help with this question: A study:r was made on the amount of converted sugar in a certain process at 1«raricnus temperatures. The data were coded and recorded as follows: Temperature, :1: ...
9- I need help with this question: In a certain type of metal test specimen. the normal stress on a specimen is known to he funlzztjonallvr related to the shear resistance. The following is a set of c...
The breaking strengths of cables produced by a certain manufacturer have a mean, μ, of 1950 pounds, and a standard deviation of 100 pounds. It is claimed that an improvement in the manufacturing p...
8- I need help with this question: A professor in the School of Business in a university polled a dozen colleagues about the number of professional meetings they attended in the past five years (x) an...
4.4 question 2 1)Enter the hull hypothesis:Ho 2)Enter the alternative hypothesis for this test: H1 3)Is the original claim in the null hypothesis Ho or the Alternative H1? 4) what is the p-value for t...
7- I need help with this question: At engineering faculty, it is estimated that at most 25% of the students ride bicycles to class. Does this seem to be a valid estimate if, in a random sample of 90 c...
4.4 question 1 1)Enter the hull hypothesis:Ho 2)Enter the alternative hypothesis for this test: H1 3)Is the original claim in the null hypothesis Ho or the Alternative H1? 4) what is the p-value for t...
6- I need help with this question: For testing Hg: :1 = 14, H1: :1 at 14, an at = (1115 level t—test is being considered. What sample size is necessary in order for the probability to be ill of fals...
5- I need help with this question: Engineers at a large automobile manufacturing company are trying to decide whether to purchase brand A or brand B tires for the company's new models. To help them ar...
4- I need help with this question: A researcher in the University of Toronto claims that the average life span of mice can be extended by as much as 8 months when the calories in their diet are reduce...
Managers at an automobile manufacturing plant would like to examine the mean completion time, μ, of an assembly line operation. The past data indicate that the mean completion time is 44 minutes, b...
3- I need help with this question: The average height of females in the freshman class of a certain college has historically been 162.5 centimeters with a standard deviation of 6.9 centimeters. Is the...
Question 3 4.5 1)Enter the hull hypothesis:Ho 2)Enter the alternative hypothesis for this test: H1 3)Is the original claim in the null hypothesis Ho or the Alternative H1? 4) what is the p-value for t...
1- I need help with this question: In a research survey in a certain city, a sample of 400 voters are asked if they favor an additional 4% gasoline sales tax to provide badly needed revenues for stree...
5.1 Suppose, as an owner, you could leave the highly competitive league (in terms of closeness of contests) that you currently play in and enter a league that assured that your team would never lose a...
Question/ page 2 4.5 1)Enter the hull hypothesis:Ho 2)Enter the alternative hypothesis for this test: H1 3)Is the original claim in the null hypothesis Ho or the Alternative H1? 4) what is the p-value...
What's the proper way to work this out quarterly data over the use and property taxes. The trend equation for this dia Is noted below. The 1st quarter 10 years ago was coded 1, and quarter was coded 2...
Question 2 4.5 1)Enter the hull hypothesis:Ho 2)Enter the alternative hypothesis for this test: H1 3)Is the original claim in the null hypothesis Ho or the Alternative H1? 4) what is the p-value for t...
The data below is for world population from 1950-2008. Use the table below to answer the following questions. X, Number of years after 1950 Y, World population in billions 0 2.6 10 3.0 20 3.7 30 4.5 4...
A particular item has a demand of 9000 units per year. The cost of one procurement is ksh 100 and the holding cost per unit is ksh 2.40 per year. The replacement is instanteneous and no shortages are ...
Identify the Bayes' formula for a given situation. On any given day in which it had rained, there was a 40% chance that the morning was cloudy. When you wake up in the morning, you notice that it is c...
Please see photo The body temperatures in degrees Fahrenheit of a sample of adults in one small town are: 97.1 99.3 99.9 99.5 97.5 96.4 99.1 96.6 99.4 98.7 97.6 98.1 Assume body temperatures of adults...
4804141904 21. The prices of the 21 top—rated 28-inch direct view television sets are as follows. $220 $330 $390 $430 $460 $550 $620 260 340 430 430 510 560 630 300 360 430 430 510 570 630 Determine...
Please see photo Assume that a sample is used to estimate a population mean u. Find the 99.5% confidence interval for a sample of size {:13 with a mean of 42.4 and a standard deviation of 3.3. Enter y...
Please see photo You are interested in finding a 90% confidence interval for the average number of days of class that college students miss each year. The data below show the number of missed days for...
Please see photo You are interested in finding a 93% confidence interval for the average commute that non- residential students have to their college. The data below show the number of commute miles f...
Please see photo The mayor is interested in finding a 98% confidence interval for the mean number of pounds of trash per person per week that is generated in the city. The study included 11-; resident...
Please see photo A researcher is interested in finding a 98% confidence interval for the mean number of times per day that college students text. The study included 148 students who averaged 38.8 text...
Thank you so much! Let X represent the full height of a certain species of tree. Assume that X has a normal probability distribution with mean 204.1 ft and standard deviation 63.7 ft. You intend to me...
Please see photo You measure 47 textbooks" weights, and find they have a mean weight of 30 ounces. Assume the population standard deviation is 10.6 ounces. Based on this, construct a 9995 confidence...
A HW problem from section 7.1, Probability and Statistics for Engineering and the Sciences 9th ed 8. Let a > 0, a, >0, with a +a, = a. Then P -ZO X - H =1 - Q Vn a. Use this equation to derive a...
Party Favor Oppose Unsure Total Democrat 440 400 120 960 Republican 320 480 100 900 Total 760 880 220 1860 Democrats and Republicans were surveyed for their opinions on gun control, and the results ar...
Calculate the mean, standard deviation, or variance using the normal distribution approximation of a binomial distribution.  Approximately 54% of mathematics students do their homework on time.  In ...
Items 7 through 11 refer to the admission procedure for Watsamata University, a small private University in Minnesota. Watsamata University requires all applicants to submit a admission examination sp...
Use the following contingency table to determine whether health and happiness are independent. The following table represents a random sample of individuals from the General Social Survey. Assume all ...
1. Consider Lucinda's behaviours and pinpoint the behaviours that are unacceptable in the workplace and the possible impacts of each. 2. Lucinda has a track record of poor behaviour; what makes Lucind...
i uploaded documents but i didnt recieve credits... help?
A simple random sample of size n=19 is drawn from a population that is normally distributed. The sample mean is found to be x=54 and the sample standard deviation is found to be s=18. Construct a 95?...
a sample of 900 members has a mean 2.4 inches . could it be reasonably regarded as being a simple random sample from a large population whose mean is 2.9 inches and standard deviation 3.2 inches?
In its study when Men murder Women: An Analysis of 2009 Homicide Data, 2011, the Violence Policy center (www.vpc.org) reported that 1818 women were murdered by men in 2009. Of these victims, a weapon ...
The amounts suggested by managers to buy the new toys are 25,000, 28,000, 34,000 or 38,000 units. The wide range of these quantities indicates a considerable discrepancy in market potential. The manag...
What is the first entry of the stable vector for the Markov chain with probability transition matrix with two states where  P11​=0.25 and P22 = 0.5
basketball player's success in shooting 3-point field goals can be described by a two-state Markov chain, where the states are made and missed. If she made her last shot, she makes her next one with p...
The probability that a young adult has a landline phone is 0.24. The probability that a young adult has a cell phone is 0.93. The probability that a young adult has neither is 0.04. What is the probab...
Smoking - Bethany de la Roca AP Statistics Chapter 8...
Can you please assist me with the following problem? The Linis website states ,the mean price for a bottle of red wine that scores 4.0 or higher on the Linis Rating System is $32.48. A  lifestyle mag...
Suppose  x  has a distribution with  μ  = 19 and  σ  = 17. (a) If a random sample of size  n  = 42 is drawn, find  μ x ,  σ   x  and  P (19 ≤  x  ≤ 21). (Round  σ x  t...
Suppose  x  has a distribution with a mean of 90 and a standard deviation of 20. Random samples of size  n  = 64  are drawn. (a) Describe the  x  distribution  and compute the mean and sta...
5. Suppose  x  has a distribution with  μ  = 63 and  σ  = 20. (a) If random samples of size  n  = 16 are selected, can we say anything about the  x  distribution of sample means? No, th...
A certain mutual fund invests in both U.S. and foreign markets. Let  x  be a random variable that represents the monthly percentage return for the fund. Assume  x  has mean  μ  = 1.9% and sta...
explain the difference between likelihood and probability.
Ten years ago, the University of Windsor looked at all the visa students studying at the university and determined that 8% came from the United States, 12% came from South American, 8% came from Afric...
Let  x  be a random variable that represents the weights in kilograms (kg) of healthy adult female deer (does) in December in a national park. Then  x  has a distribution that is approximately nor...
Mars Inc. reports that yellow candies make up 20% of its milk chocolate M&M's res another 20% and orange, blue and green 10% each. The rest are brown. Suppose we buy a bag of M&M's and this is...
We are given a machine learning problem where the total error r(d,θ) is calculated to be 650 and the variance is 625. What is the bias?
The incubation time for a breed of chicks is normally distributed with a mean of 21 days and standard deviation of approximately 2 days. Look at the figure below and answer the following questions...
At a drive-in (similar to Sonic), three employees pre-make hamburgers. Between 7 p.m. and 8 p.m., 120 customers typically order a hamburger. What should be set as the taktzeit for the hamburger pro...
For a Bernoulli Distribution E(X) = p and Var(X) = p(1-p). Show in detail the derivation of Var(X) = p(1-p).
The following are the P/E ratios (price of stock divided by projected earnings per share) for 20 banks. 14, 15, 38, 19, 50, 22, 21, 34, 19, 23, 29, 18, 31, 23, 14, 22, 25, 29, 22, 18 Find 25th and 90t...
In a New York State daily lottery game, a sequence of four digits (not necessarily different) in the range 0-9 are selected at random. Find the probability that all four are different.
Can you please assist me with the following problem? Review the information and answer correctly. 1.) Wealth magazine states, Maryland had the highest median annual household income of any state in 20...
please see photo The average amount of money spent for lunch per person in the college cafeteria is 56.1 and the standard deviation is 51.59. Suppose that 14 randomly selected lunch patrons are observ...
please see photo The number of seconds X after the minute that class ends is uniformly distributed between 0 and 60. Round all answers to 4 decimal places where possible. a. What is the distribution o...
Can you please assist me with the following problem? Review the following information and answer accordingly. 1) A 2019 survey performed by the technology market research firm The Information Group, U...
1.) While her husband spent 2½ hours picking out new speakers, a statistician decided to determine whether the percent of men who enjoy shopping for electronic equipment is higher than the percent of...
The following scatterplot shows the 20 top-selling cars with their weight on the horizontal axis and their miles per gallon (mpg) on the vertical axis.  The overall direction of this data is ________...
Please answer A bank is offering a new low-rate car loan. To decide which applicants will receive the loan and which applicants will be denied, the applicant's credit score is investigated. Test the c...
G ugixyzydivi Limit: 2:00:00 Time Left:1:01:22 IMANI D MOORE: Attempt 1 e 1: Previous Page Next Page Page 5 of 16 Question 5 (5 points) e 2: Find a 90% confidence interval for the proportion of patien...
The marital status distribution of the U.S. male population, age 15 and older, is as shown below. The marital status distribution of the U.S. male population, age 15 and older, is as shown below. Mari...
Select the statement about the correlation coefficient (r) that is TRUE. a.) The correlation coefficient r = 0.75 shows a strong positive relationship between two variables.  b.) The correlation coef...
Hxhcuckxhxjxjxh Question 15 (5 points) e 2: Use the data given in the table to answer the following questions. The following table gives the age (x) and the number (y) of hours spent watching televisi...
Car manufacturers are interested in whether there is a relationship between the size of car an individual drives and the number of people in the driver's family (that is, whether car size and family s...
The number of tickets purchased by an individual for Beckham College's holiday music festival is a uniformly distributed random variable ranging from 4 to 10.   Find the mean and standard deviation o...
B b ivicudududididudifufu13 mit: 2:00:00 Time 1: The probability of a new automobile having an air conditioner is 90%. (a) If 12 new cars are randomly selected, find the probability that exactly 10 ha...
A group of people were asked to listen to one of four tapes. Group 1 listened to Frank Sinatra, group 2 listened to elevator music, group 3 listened to the symphony, and group 4 listened to whale son...
Think of a problem that you may be interested in that deals with a comparison of two population means. Propose either a confidence interval or a hypothesis test question that compares these two means....
The following are advertised sale prices of color televisions at an electronics store. The following are advertised sale prices of color televisions at an electronics store. Size (inches) Sale Price (...
Which of the following is NOT an example of a binomial distribution? a.) The probability of a dart player hitting the bullseye three times in eight attempts. b.) The probability of a basketball player...
Use the following distribution of sample values to compute the standard deviation. 5 8 10 12 15 18 Show Work! (2 points) In a normal distribution of scores a mean of 800 and a standard deviation of 1...
Thank you very very much! : ) A particular fruit's weights are normally distributed, with a mean of 323 grams and a standard deviation of 15 grams. If you pick 21 fruit at random, what is the probabil...
On the midnight shift, the number of patients with head trauma in an emergency room has the probability distribution shown below.       x 0 1 2 3 4 5 Total P(x) .09 .38 .28 .16 .06 .03 1.00   (a) ...
Review the following information and answer the questions correctly Army radar and missile detection systems are created to warn a nation of an rival attack. A reliability question is whether a detect...
Q10 question that's answered using the grap 1) is delivered to a busy 2) it is a parcel and is delivered to a home 3)either is an advertisement or is delivered to a business 4) is not a magazine 5)is ...
Thank you so much! Thinking it might be helpful, you ask the TCC Institutional Researcher for data. He doesn't have the data you need, but he does tell you that the population mean GPA is 2.82 with ...
Let X represent the weight of a randomly selected student in Davis. Let's also suppose that the weight is distributed with a Poisson distribution with mean = 50kg. a) In a sample of 20 randomly select...
Thank you so much! In the country of United States of Heightlandia, the height measurements of ten-year-old children are approximately normally distributed with a mean of 56.1 inches, and standard dev...
Please help me with the following problem A study questioned undergraduates of various age groups whether or not they had applied to more than one school. After collecting the data, the ensuing joint ...
9 hhghjhghjjjkkk e 1: Question 9 (12 points) The mean time required to complete a test is 41.6 minutes with a standard deviation of 8.5 minutes. If the data follows a normal distribution: e 2: (a) Fin...
A random sample of 150 homes found that 30 had high levels of radon, a deadly and odorless gas. a. Construct a 99% confidence interval for the proportion of homes with high levels of radon. b. Complet...
Let X represent the weight of a randomly selected student in Davis. Let's also suppose that the weight is distributed with a Poisson distribution with mean = 50kg. a) In a sample of 20 randomly select...
A manufacturer of sprinkler systems designed for fire protection claims that the average activating temperatuer is at least 135 degree foreignhight . to test this claim , you randomly select a sample ...
Between 300 and 600 miles and follows uniform distribution. Probability is more than 525? Probability is between 350 and 525? At least how many miles on furthest 20%?
­­­­­­­­­­­­­­­­­ A study to define viewer response to a new tv show obtained the following data. Rating Frequency Poor 6 Below average 8 Average 11 Above average 15 Excellent 10 (a) ...
Gardasil™ is a vaccine indicated in females, ages 99 through 26, for the prevention of diseases caused by the human papillomavirus (HPV). A government report contained summary data on the efficacy o...
Global Traveler magazine gives a yearly list of the 500 best hotels in the world. The magazine gives a rating for each hotel along with a short explanation that includes the size of the hotel, ameniti...
Cbxvxhhvgfcvccfhh e 1: Question 14 (3 points) Each member of an English class of 18 males and 13 females writes a short story. e 2: The instructor selects two different papers (without replacement) to...
Probability distributions are commonly used by investors. Why do you think investors find them so useful? Give an example of how you could use a probability distribution to convince somebody to invest...
Bnbjjhjgzfhxhxhjg e 1: Question 9 (12 points) The mean time required to complete a test is 41.6 minutes with a standard deviation of 8.5 minutes. If the data follows a normal distribution: e 2: (a) Fi...
A woman liked to play the game Minesweeper and she won 12 of the last 20 games she played. Now that you know how to calculate p-values, use an applet to find the p-value to investigate whether her res...
3.) Chapter 5,6, and 7 Practice a.) Assume that the readings at freezing on a batch of thermometers are normally distributed with a mean of 0°C and a standard deviation of 1.00°C. A single thermomet...
Yduchxhxjvki Limit: 2:00:00 Time Left e 1: Question 7 (6 points) The following table represents the number, x, of TV sets owned by families in a survey and the probability of each. Calculate the indic...
In many states, lawyers are encouraged to do pro bono work by both their firms and judicial advisory councils. However, in recent years lawyers have been devoting more time to their paying clients and...
Cbxvbcvvbfghhyuu al Exall Limit: 2:00:00 Time Left: 1:41:25 IMANI D le 1: The probability of a new automobile having an air conditioner is 90%. (a) If 12 new cars are randomly selected, find the proba...
In a survey of 1014 ​adults, a polling agency​ asked, "When you​ retire, do you think you will have enough money to live comfortably or not. Of the 1014 ​surveyed, 533 stated that they were ...
Vvbbbvcghjy hal Exalll Limit: 2:00:00 Time Left:1:45:03 IMANI e 1: The mean time required to complete a test is 41.6 minutes with a standard deviation of 8.5 minutes. If the data follows a normal dist...
You are playing with single 8 sided fair dice numbered with dots ( 1-8). Assume for every dot you see you win a dollar. (so if see 6 dots I win $6 dollars). X=the number of dots you see on the face of...
I'm thhjhhjjjjj al Exam IMANI D MOORE: AL Limit: 2:00:00 Time Left: 1:46:59 Page 7 of 16 Next Page le 1: Previous Page Question 7 (6 points) e 2 The following table represents the number, x, of TV set...
I don't know how to approach this problem. Please help me! Thank you. 3. Let X follow the extreme value distribution which has the cdf F (50) = 1 — e761, —00 < LI: < 00. Find and state the d...
Topic: Correlation and Regression Analysis and Analysis of Variance. Step 1: state the null and alternative hypothesis Step2: Type of test, sample size Step3: Identify the critical values of test stat...
Dudufigocuxic e 1 Question 15 (5 points) Use the data given in the table to answer the following questions. The following table gives the age (x) and the number (y) of hours spent watching television ...
Please make sure the answer is correct—the last two of these questions I've asked have not been right. Espanol The table of ordered pairs (x, y) gives an exponential function. Write an equation for ...
Given this article: Tapper, K., & Seguias, L. (2020). The effects of mindful eating on food consumption over a half-day period. Appetite, 145, 104495. https://www.sciencedirect.com/science/artic...
A survey showed that among 785 randomly selected subjects who completed four years of college, 144 of them are smokers.  Use a 0.01 significance level to test the claim that the rate of smoking amon...
In how many ways can you distribute $20 to five different individuals such that no one gets more than $5 (each person can get $0, $1, $2, $3, $4 or $5)? use a generating function and determine the pro...
Diploma of management and leadership Describe the concept of a balanced scorecard as an alternative approach to measuring business performance through key performance indicators.  
Ghhgfggggg al Exam - Requires Respondus LockDown Browser + Webcam Limit: 2:00:00 Time Left: 1:59:42 IMANI D MOORE: Attempt 1 le 1: In a sample of 210 children selected randomly from one town, it is fo...
A basketball player has a 70% accuracy rate for making free throws. Mark thought that each attempt was independent and the probability stayed at 70% for this player. During a game, this player was fou...
Es necesario estimar entre 10.000 establos, el número de vacas lecheras por establo con un error de estimación de 10 y sabemos que la varianza es 100. ¿Cuántos establos deben visitar para ser alca...
Identify criteria of a binomial distribution Which of the following is NOT an example of a binomial distribution? a.) The probability of a basketball player making a free throw seven times in ten atte...
Las cantidades que sugieren los gerentes para comprar los nuevos juguetes son 25 000, 28 000, 34 000 o 38 000 unidades. El intervalo tan amplio en que se encuentran estas cantidades indica una conside...
Calculate the mean, standard deviation, or variance using the normal distribution approximation of a binomial distribution.  Approximately 54% of mathematics students do their homework on time.  In ...
Let X=number of customers who take option 1 (as your described it) and X is a binomial random variable with n=15, and p=0.33. How likely would we have 10 or more customers choosing option 1? How likel...
#10 Let  x  be a random variable that represents the batting average of a professional baseball player. Let  y  be a random variable that represents the percentage of strikeouts of a professional ...
A bakery owner asked 150 customers to taste a new type of cookie and found that 60 people liked its taste. Which of these is an example of descriptive statistics?
an article analysis for each using the "Article Analysis: Part 2" template.
1. Take a random sample from a bivariate normal data based on your Student ID number as follows: set.seed(S1:udentID) it use the numerical value of your Student ID x = rnorm(500) y = 2 =1: 1: + rnorm...
in a regression model, at any given combination of values of the independent variables, the population of potential error terms is assumed to have an F distribution is true or false?
On each trial of an experiment, a subject is presented with a constant soft noise, which is interrupted at some unpredictable time by a noticeably louder sound. The time it takes for the subject to re...
Exercise I got 2.308 Suppose X1, X2, ..., X10 are independent normal random variables with mean 0 and variance 1. Let M = max{ X1, X2, .. ., X10 } What is the largest value of t so that P(M < t) &l...
Given this article: Tapper, K., & Seguias, L. (2020). The effects of mindful eating on food consumption over a half-day period. Appetite, 145, 104495. https://www.sciencedirect.com/science/artic...
Please Answer TV News 7 Translate Web Store Gmail White Privilege: Rea. Perform and Interpret a Two-Proportion Hypothesis Test with Technology - Calculator Question A company is taste testing its new ...
Please help explain the following questions,  Give four examples of descriptive statistics? What is the difference between qualitative statistics and quantitative statistics? Why are each important? ...
Need worked out Name: Date: Score: 1. What is statistics? A survey of 2750 American households found that 78% of the households had either cable or satellite television. Population: Sample: 3. Classif...
This cumulative quiz tests your understanding of concepts, terminology and statistical application presented in Topics 1-3
A survey of 25 retail stores revealed that the average price of a DVD was $375 with a standard deviation of $20. a) What is the 99% confidence interval to estimate the true cost of the DVD? b) What sa...
The average lifespan of a tiger is about 12 years. You are wondering if tigers in captivity have a shorter lifespan. You collect a random sample of 32 tigers in captivity and find their average lifesp...
A report claimed that 40% of computer users use Chrome as their web browser. You believe it is less so you collect a random sample of 250 computer users and find that 85 use Chrome. You conduct a hypo...
A sample of 80 gas stations in Minnesota found the average price of a gallon of gas to be $2.18 with a sample standard deviation, s, to be $0.31. a) Construct a 95% confidence interval for the average...
Lets say we got a 5 sided dice, where the probability of each side are P(side 1) = 0.15, P( side 2) = 0.25, P(side 3) = 0.4, and P(side 4)= 0.1 P(side 5)=0.1 If X is what you see, what will the expect...
1.    A nurse practitioner is interested in examining a relationship between perceived health status (poor - excellent) and the presence or absence of chronic disease. Use chronicD.sav , run chi-s...
1.    True or False? An investigator should report the findings with chi-square statistics along with corresponding p- value even when the expected frequencies of any cell is less than 5.
Toby's Trucking Company determined that the distance traveled per truck per year is normally distributed, with a mean of 50 thousand miles and a standard deviation of 12 thousand miles. What proportio...
h. Find a 90% confidence interval for men of height 60 inches (use your answer from part g). Include your interpretation of the confidence interval. Show your formula for E with all important values ...
1.    True or False? An investigator should use chi-square test of association when he/she is interested in examining a relationship between the two categorical variables.
what do we conclude about xj if we can reject H0: alphaj = 0 in favor of Ha: alphaj doesnot equal to 0 by setting: A) alpha equal to .05? B) alpha equal to .01? xj is significantly related to y with a...
Tree-ring dates were used extensively in archaeological studies at Burnt Mesa Pueblo. At one site on the mesa, tree-ring dates (for many samples) gave a mean date of  μ 1  = year 1265 with standa...
You are looking at the proportion of people in Davis using public transportation. How many people must you pool in order to not exceed more than 3% margin of error given you are calculating 95% confid...
Part a. Let's conduct an ANOVA test. Calculate the p-value and test statistic. Paste the results below. Part b. Using a significance level of 5%, do you reject or fail to reject the null hypothesis? W...
You are looking at the average weight of babies in the United States. You randomly select with replacement 64 babies and see that their birth weight averages to 6.5 lb with st. dev. of the sample 0.5 ...
14. Sketch the area under the standard normal curve over the indicated interval and find the specified area. (Round your answer to four decimal places.) The area to the left of  z  = −0.57  is 
statistics and probability experts Exercice 2: A biostatistician is interested in studying the time X (in seconds) it takes a hematology cell counter to complete a test on a blood sample. The probabil...
15. Sketch the area under the standard normal curve over the indicated interval and find the specified area. (Round your answer to four decimal places.) The area to the right of  z  = 1.61 is
In the research reported by Hollander in which confederates either followed or did not follow group norms, which of the following was found?
You are testing the claim that the mean GPA of night students is less than the mean GPA of day students. -Sample 1: You sample 20 night students, and the sample mean GPA is 2.84 with population standa...
1.    True or False? A study was conducted to compare three groups' (nurse staffs, nurse administrators and patients) perceptions regarding respecting to patients' autonomy during nurse care. The ...
The taxi and takeoff time for commercial jets is a random variable  x  with a mean of 8.9 minutes and a standard deviation of 2.5 minutes. Assume that the distribution of taxi and takeoff times ...
f. Use a 1% level of significance to test the claim that o > 0. Show all steps of your hypothesis test
A European growth mutual fund specializes in stocks from the British Isles, continental Europe, and Scandinavia. The fund has over 350 stocks. Let  x  be a random variable that represents the mont...
i need help with : . Multiple Choice Question An engineer measures the weights (in kilograms) of steel pieces. The}r would like to test H0 : p. = 5 against H1 : ,u. > 5. The weights follow a normal...
The 15 most populous states in the United States have an average population of 141.51 million, with a standard deviation of 87.49 million. Virginia and Washington have populations of 83.83 million and...
A certain mutual fund invests in both U.S. and foreign markets. Let  x  be a random variable that represents the monthly percentage return for the fund. Assume  x  has mean  μ  = 1.9% and sta...
al decir FALLO PARA RECHAZAR ho , quiere decir que se acepta ho? o que se rechaza ho?
What is true about an independent samples t-test and a between subjects one-way ANOVA (they will be referred to as the t-test and the ANOVA in the answer choices)? What is true about an independent sa...
Let  x  be a random variable that represents the weights in kilograms (kg) of healthy adult female deer (does) in December in a national park. Then  x  has a distribution that is approximately nor...
Let  x  be a random variable that represents white blood cell count per cubic milliliter of whole blood. Assume that  x  has a distribution that is approximately normal, with mean  μ  = 7300 ...
i need help with this question ! ___ ______ _______ _'_ _______ We have m = 5 preliminaly samples of Size n = 3 (some numbers have unfortunater been erased by accident by a clumsy co—cp student): Ii...
Suppose the heights of 18-year-old men are approximately  normally distributed , with mean 70 inches and standard deviation 4 inches. (a) What is the probability that an 18-year-old man selected ...
A very large batch of electronic components has arrived at a distributor. The batch can be characterized as acceptable only if the proportion of defective components is at most 0.11. The distributor d...
Part a. Let's conduct an ANOVA test. Calculate the p-value and test statistic. Paste the results below. Using a significance level of 5%, do you reject or fail to reject the null hypothesis? Why? Expl...
1.    True or False? A nurse investigator wants to explore whether exercising regularly has any influence on systolic blood pressure (SBP). SBP was measured before and after 3 month exercise progr...
Let X represent the weight of a randomly selected student in Davis. Let's also suppose that the weight is distributed with a Poisson distribution with mean = 50kg. a) In a sample of 20 randomly select...
 A light bulb manufacturer guarantees that the mean life of a certain type of light bulb is 750 hours.  A random sample of 36 light bulbs has a mean life of 735 hours.  If we assume that the popu...
Coal is carried from a mine in West Virginia to a power plant in New York in hopper cars on a long train. The automatic hopper car loader is set to put 62 tons of coal into each car. The actual weig...
Which of the following statements is true about a p value of .04? V3212" of the following statements is true about a p value of Select one: C) a. The test statistic is significant. 0 b. If this p v...
need help with this question! We have m = 5 preliminary samples of size n = 3 (some numbers have unfortunater been erased by accident by a clumsyr co-op student): 3' 17:51 17:32 17:33 931' T1; 3:? 1 2...
I need help with these questions. Thank you. Put answers by numbers # Question 24 of 33 Step 1 of 1 02:56:49 SIA VI LLIC SLUGCHS did given UClow. Student 1 2 3 4 5 6 Before Course 325 495 525 480 525 ...
You are playing with single 8 sided fair dice numbered with dots ( 1-8). Assume for every dot you see you win a dollar. (so if see 6 dots I win $6 dollars). X=the number of dots you see on the face of...
It has been suggested that abnormal male children tend to occur more often in children born to older than average mothers.  Case histories of 20 abnormal males were obtained.  The mean age of the ...
Consider a tricky 5 sided dice, where the probability of each side are P(1) = 0.15, P(2) = 0.25, P(3) = 0.4, and P(4)= 0.1 P(5)=.1 a) Let X be the value you see on the dice. What is E[X]? b)What is th...
I really cannot understand this The table of ordered pairs (x, y) gives an exponential function. Write an equation for the function. X V - 1 256 0 64 Aa 16 2 4 0=0 0.0 X ?
1. A researcher measured stress levels on a 1-10 scale and performance of accountants by counting the number of errors they made in a week period. Conduct a hypothesis test using Pearson's correlati...