A researcher uses an anonymous survey to investigate the television-viewing habits of American
adolescents. Based on the set of 356 surveys that were completed and returned by teenagers enrolled to
the study, the researcher finds that they spend an averag
Views on Legalization of Medical/Recreational Marijuana at UTSA
What is your stance on the legalization of marijuana? As a topic that has been covered
all over media headlines and across the country, marijuana rationale is a proposition
that can no longer
1. Using the dataset below, provide the following:
a. sample mean acres burned
b. sample mean timber sales
c. sample variance of acres burned
d. sample variance of timber sales
e. z-scores of acres_burned
f. z-scores of timber_sales
g. correlation between
Practice Problems 9
1. A survey of microbiologists across the US found that the average net income is $74,914. Because
this survey is now more than 10 years old, a researcher wants to test this claim at the .05 level of
significance by taking a random sam
Calculating Probabilities of Binomial, Geometric and Normal R.V.s
For each of the following determine if the random variable is binomial or geometric. Based on its
distribution (binomial or geometric distribution), determine the corresponding probability:
Practice Problems (descriptive statistics)
1. A chemical company claims their latest patented alloy has a melting point 6150F. To determine the validity of
this claim, systematic sampling was performed at several different production lines within the comp
Practice Problems 4-Probability and Basic Probability Rules
1. The following client company data reveals that 155 employees worked one of four types of
positions. Given below is the frequency table for each category of position type and gender. If an
empl
STA 1053-Probability Rules
Using the following table to solve questions 1-5:
Seatbelt
No Seatbelt
No Injury
528
132
Non-Fatal Injury
248
182
Fatal Injury
149
413
1) How many variables are being considered in the table and what are they?
2, Injury Status &
Practice Problems: Mean, Variance, and Std. Dev. of Discrete Data
NOTE: In statistics, finding the expected value or expected number is the same as finding the meanthe terms are used interchangeably.
1.
During one holiday season, the TX lottery played a g
PRACTICE PROBLEMS: confidence intervals and hypothesis tests
Dont forget to provide interpretations.
1. A survey was taken of US companies that do business with firms in India. One of the questions
on the survey was: Approximately how many years has your
Lecture 8 Practice Problems
1. Suppose daily Android phone sales across all major cities are normally distributed with a mean
of $2.2 million and a standard deviation of $ .32 million.
a.
What is the probability that todays sales exceed $3.1 million?
.002