August 2009
Beginner
384 pages
8h 9m
English
book
Even You Can Learn Statistics: A Guide for Everyone Who Has Ever Been Afraid of Statistics, Second Edition
by David M. Levine, David F. Stephan
Content preview from Even You Can Learn Statistics: A Guide for Everyone Who Has Ever Been Afraid of Statistics, Second Edition
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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
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 data that need to be true in order to use these ...