Even You Can Learn Statistics A Guide for Everyone Who Has Ever Been Afraid of Statistics

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 Paired t Test

• Important Equations

• One-Minute Summary

• Test Yourself

In Chapter 7, you learned about the fundamentals of hypothesis testing. In this chapter, you will learn about tests that involve two groups, more formally known as two-sample tests. The following tests are discussed:

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

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

You will also learn how to evaluate the statistical assumptions behind these tests—what to do if the assumptions do not hold—as ...