1.
I subtracted 100 from 28 and that from 53 and got 18.2. Then I divided 18.2 by 1000 and got my answer
So the probability = 0.182
Answer: 0.182
2.
I added up all the drink choices and came up with 60. I them divided the 18 which Is juice by 60 and got
m
Stat 1220 - Ch 5.1 - 5.4 | 1
Section 5.1: Continuous Random Variables
Obiectives:
0 Understand the concept of the probability distribution of a continuous random
variable and how it is used to compute probabilities.
0 Learn about the family of normally
17.
18.
22.
SUM/YE Alf! lg. (ail
Homework 10
Due 2/26
To get all the credits you have to provide how you solved each of the following problems.
Use the following information for questions 17 to 18.
In a Clinical trial, 200 patients who received a new medi
Salem Modem
Homework 13
Due 04/01
To get all the credits you have to provide how you solved each of the following problems.
% A corporations management wishes to estimate the difference in mean weekly sales heme-en salesmen
who are at least 20 lbs. overwe
be lend Maryland
Homework 9
Due 02/23
To get all the credits you have to provide how you solved each of the following problems.
1. The propertion of a population with a characteristic of interest is p = 0.76. Find the mean and standard
deviation of the sa
3200a nished
Homework 8
Due 02/17
To get all the credits you have to provide how you solved each of the following problems.
1.
Use the following information to answer questions 13, 14, 15 and 16.
The weights of adult Fox Terriers in US (a dog breed) are n
Homework 7
Due 02/12
1.
If :1: is a normally distributed random variable with mean 762 and standard deviation 34 then
P (1' 3" 704) is net (YalCleo (70-th031133 7L0 222 , 54)
(a) 0.8212 (13) 0.8311 @0.9564 (d) 0.0436 (e) 0.51136
2. .
Scores on a standardi
Soto/Ina Alla ( filmy-10L
Homework 6
Due 02/10
Round to 4 decimal Places
Make sure to show your work for each problem
1.
For the standard normal landom variable .- P( 2 01 < z < i)- 36)is
ommmcgiHSz 0 0 :33 ; ~ (MS 1-
@ 0.6184 (b) 0.6628 (c) .6406 (d) 0.3
31$ end Martmei
Homework 15
Due 04f08
To get all the credits you have to provide how you solved each of the following problems.
2. A breeder of thoroughbred horses wishes to model the relationship between the gestation period in
days (3:) and the life spa
homework: :5
Due 0 1/21
1. A mother is told that her 13 year old son's height is the 85th percentile. This implies that:
(a) Her son's height is less than that of 85% of all 13 year old boys.
(b) Her son has attained 85% of his adult height.
(0) Her son's
Assignment Week 2 Solutions Due by Sunday 7/17
Please show all work to receive credit.
1. A university is offering 3 language classes: one in Spanish (Sp), one in French (Fr), and one in
German (Ge). The breakdown of the students enrolled for the language
Assignment Week 2 Due by Sunday 7/17
Please show all work to receive credit.
1. A university is offering 3 language classes: one in Spanish (Sp), one in French (Fr), and one in
German (Ge). The breakdown of the students enrolled for the language course by
CHAPTER IV
HYPOTHSIS TESTING
The aim of hypothesis testing is to aid researcher in reaching a conclusion
concerning a population by examining a sample from that population. Ii is also
called null hypothesis testing and significance testing. This form of s
Assignment 3 Solutions Chapters 6 and 7
1. Consider a random sample size of 100 drawn from a population with mean 50 and standard
deviation 10. Find the mean of the sample mean.
a. 100
b. 10
c. 50
d. 5
e. 1
c; Easy
2. Consider a random sample size of 100
Assignment 4 Chapters 8 and 9 Due Sunday, 7/31
1. In a test of hypotheses, a Type I error is the decision:
a. to reject H0 when it is false.
b. not to reject H0 when it is true.
c. not to reject H0 when it is false.
d. reject H0 when it is true.
e. None o
3.1 Sam le 3 aces Events and Their Probrabilities
Arandom experiment is: ammtil'uvx\ 0( imai «Vina-“34A “JR-Ci“ j
7 WOW M‘UW (gummwawiiorﬂsporu'esi (m? «MW/i2
The result of a single trial in a probability experiment is an
O i c mi
The set of all possibl
Stat 1222-Section 2.3
2.3- Measures of Variabiligg
Range: MM 00:064. M161“ , Wrﬂﬂat‘amm1
RECALL:
Population: The collection of CU ’ outcomes, repsonses, measurements, or counts that are of
interest.
Sample: A éu log T{' of the population.
POPULATION VAR
STAT 1222- Section 2.2
Section 2.2 — Measures of Central Location
3Most common measures of central tendency: (A vat/(M4. W04 WKLW‘ILS a 44.191181 , 6‘”
0 Mean . OJWNQ \- ) MIMI 010 CAEATK '
0 Median
0 Mode
22- : _,.,/ 5: "f”
Sample Mean: Population Mean
Problems '27 am! 28 pertain to the following situation.
In a survey of i 120 new college graduates 21'“ had a professional job on graduation day.
'37. One year ago the proportion of graduates with a professional joh on graduation day was .21} or 21%;.
The
Test 2 Review Stats 1222 (5.1—7.4)
Name Z! I]: (’1
PC?» 'l-tr
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question.
Provide an appropriate response. 12M! I”: I 0 {to 00’ MOJCJ'p C' " ’2‘?me 0‘
1) Find the a
STAT 1222 FINAL EXAM Spring 20 1 5
1. The Department of Education wishes to estimate the proportion of all college students
who have a job off—campus. It surveyed 1600 randomly selected students; 451 had such
jobs. The population of interest to the Depart
TEST 1 REVIEW STATS 1222
/
Name
SHORT ANSWER. Write the word or phrase that best completes each statement or answers the question.
Determine whether the numerical value is a parameter or a statistic. Explain your reasoning.
1) A survey of 1208 students wa
5:»,qu (222 55mg 2014
Part I
Use the following to answer Questions 1 — 2.
The times (in seconds) for a sample of seven sports cars to accelerate from 0 to 60 miles per hour are
as follows: -
(fl 3.8 4.0 4.8 4.7 4.3 5.1 4.8
l/
1. Find the mean and the stan
Section 2.4 — Relative Position of Data
Quartiles: A quartile is a NUMBER. These numbers divide an ordered data set into four equai parts.
Q1= E" Quartile: 25% of the data is less than this number
Median = Q; = 2'“1 Quartile: 50% of the data is less than
Homework 6
Due 02/10
Round to 4 decimal Places
Make sure to show your work for each problem
1.
For the standard normal random variable 2, P(—2.01 < z < 0.36) is
0.6184 (b) 0.6628 (c) .6406 (1) 0.8214 ' (8) 0.2128
2. Calc Vw‘S 1142 (-2.01 ,ogm enter = Ot