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Chapter 8. Hypothesis Testing: Z and t Tests

8.1 Testing for the Difference Between Two Proportions

8.2 Testing for the Difference Between the Means of Two Independent Groups

8.3 The Paired t Test

Important Equations

One-Minute Summary

Test Yourself

In Chapter 7, you learned the fundamentals of hypothesis testing. This chapter discusses hypothesis tests that involve two groups, more formally known as two-sample tests. You will learn to use:

• The hypothesis test that examines the differences between the proportions of two groups

• The hypothesis test that examines the differences between the means of two groups

You will also learn how to evaluate the statistical assumptions about your variables that need to be true in order to use these tests ...

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