Business Statistics

Statistical Inference:

Hypothesis Testing for

Two Populations

An approximate answer to the right problem is worth a good deal more than an exact an-

swer to an approximate problem.

–John Tukey

11

LEAR NING OBJECTIVES

Upon completion of this chapter, you will be able to:

CHAPTER

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n Test the hypothesis for the difference between two popula-

tion means using the z statistic

n Test the hypothesis for the difference between two popula-

tion means using the t statistic

n Understand the concept of statistical inference of the

difference between the means of two related populations

(matched samples)

n Test hypothesis for the difference in two population ...