CHAPTER 6 HOMEWORK
We sample 20 new cars (sedans) and find the average miles per gallon (mpg)
to be 26 with a standard deviation of 1.7.
2) If we increase our sample size to 40, what is the standard error of the mean?
ANS: Standard error of mean = sd/sqrt
Homework Problems
Bowen, Straightforward Statistics
Chapter 8 One sample t Test: When is unknown.
1. In what circumstances is the t statistic used instead of a z-score for a hypothesis test?
A. the t statistic is used when the sample size is n = 30 or lar
Homework Problems
Bowen, Straightforward Statistics
Chapter 4 Standard Z scores.
1. For a population with = 100 and = 10 what z score corresponds to a score of X = 120; X = 90; X
= 125?
X=120 (Z=2)
X=90 (Z=-1)
X=120 (Z=2.5)
2. A student scores 64 on a tes
Homework Problems
Bowen, Straightforward Statistics
Chapter 3 Descriptive Statistics.
1. For which scale(s) of measurement can the mean be an appropriate measure of central
tendency? Select all that apply.
a. Nominal
b. Ordinal
c. Interval
d. Ratio
2. For
Page 1 of 3
UST 404 Summer 2017
Practice Assignment 2 Answers
Answers will be posted on Blackboard.
1. A researcher is interested in the number of cars that are owned by American
families. They collect the following data that they display in table form. F
UST 404 Summer, 2017
Practice Assignment 4
Complete the answers to the following questions.
1. Many stores run secret sales. They give out a card where you scratch
off the covering to determine what discount you will received after you
take your merchandi
UST 404 Summer, 2017
Practice Assignment 1
Page 1 of 7
Be sure to turn in a sheet with the names of those in your group so you will
receive credit for doing the project. Answers will be posted on Blackboard Learn.
1. Identify the attributes for the follow
Homework Problems
Bowen, Straightforward Statistics
Chapter 7 Hypothesis Testing
1. The university bookstore claims that the mean cost of textbooks it carries is $52 with a standard
deviation of $9.50. A group of students want to test this claim. They ran
Practice Problems
Bowen, Straightforward Statistics
Chapter 11 Correlation.
1. Which one of the following is NOT a possible value of the correlation coefficient?
A. -.80
B. .05
C. -.17
D. 1.3
2. Two lists of numbers, X and Y, have a correlation of 0.4; X
Practice Problems
Bowen, Straightforward Statistics
Chapter 12 Simple Regression
1. What are the degrees of freedom due to error for a simple linear regression with 20 observations?
A.
20
B.
22
C.
18
D.
2
2. R squared measures
A.
B.
C.
D.
the correlation
Practice Problems
Bowen, Straightforward Statistics
Chapter 5 Basic Principles of Probability.
1. Find the probability that the number obtained when a die is rolled is an odd number.
Die numbers (1 2 3 4 5 6)
Odd numbers (1 3 5)
3/6
= or 50%
2. Which of t
ASSIGNMENT 2
Use the table below to answer the following questions:
Valid
Missing
Protestant
Catholic
Jewish
None
Other
Total
DK
NA
Total
Total
FREQUENC
Y
PERCENT
953
333
31
140
35
1492
1
7
8
1500
63.5
22.2
2.1
9.3
2.3
99.5
.1
.5
.5
100.0
VALID
PERCEN
T
6
UST 404 - HOMEWORK 1
2) Suppose you want to operationalize racism at the individual
level (the degree of racist opinions a person holds).
Operationalize this concept in two ways.
(Never racist opinions, racist opinions sometimes, racist opinions often, ra
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