Business Statistics: For Contemporary Decision Making, 8th Edition

CHAPTER 10

Statistical Inferences About Two Populations

LEARNING OBJECTIVES

The general focus of Chapter 10 is on testing hypotheses and constructing confidence intervals about parameters from two populations, thereby enabling you to:

1. Test hypotheses and develop confidence intervals about the difference in two means with known population variances using the z statistic.

2. Test hypotheses and develop confidence intervals about the difference in two means of independent samples with unknown population variances using the t test.

3. Test hypotheses and develop confidence intervals about the difference in two dependent populations.

4. Test hypotheses and develop confidence intervals about the difference in two population proportions.

5. Test hypotheses about the difference in two population variances using the F distribution.

L. L. Bean

L. L. Bean, with headquarters in Freeport, Maine, began as a one-man operation in 1912 by selling hunting boots from a circular entitled “The Maine Hunting Shoe” and has evolved into the leading U.S. catalog company and the largest supplier of outdoor gear in the world, with annual sales of $1.44 billion. The company's founder, Leon Leonwood (L. L.) Bean, was a Maine outdoorsman and hunter and an entrepreneur. As a result of one cold, wet hunting ...