CHAPTER 11
TWO-SAMPLE TESTS OF HYPOTHESIS
Chapter Goals
After completing this chapter, you will be able to:
1. Conduct a test of a hypothesis about the difference between two independent population
means.
2. Conduct a test of a hypothesis about the differ

Glossag
Condence Interval: A range of values constructed from sample data so the parameter occurs within
that range at a specied probability. This specied probability is called the level of condence.
Condence limits: The end points of the condence interva

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CHAPTER 14SIMPLE LINEAR REGRESSION
PROBLEM
1. Assume you have noted the following prices for books and the number of pages that each book
contains.
Book
A
B
C
D
E
F
G
a.
b.
c.
Pages (x)
500
700
750
590
540
650
480
Price (y)
$7.00
7.50
9.00
6.50
7.50
7.00

Solutions to practice problems on Multiple Regression
(The next 5 questions are based on the following information.)
Imagine that you are head of personnel at Huge Corp. The CEO keeps getting other people's mail by
mistake, so she asks you to conduct a st

PROBLEM
1. Shoppers were asked where they do their regular grocery shopping. The table below shows the
responses of the sampled shoppers. We are interested in determining if the proportions of females in
the three categories are different from each other.