Chapter_8

# Chapter_8 - Chapter 8 Hypothesis Testing With Two...

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Chapter 8 Hypothesis Testing With Two Samples (Mean Difference and Difference of Means) Outline - Related Samples a. The Logic of the Test b. The Null Hypothesis c. Combining the Logic and the Null d. The Standard Error of the Mean Difference e. Applying the Test f. Interpreting the Results g. Some Additional Samples - Independent Samples h. The Logic of the Test i. The Null Hypothesis j. Combining the Logic and the Null k. The Standard Error of the Difference of Means l. Applying the Test m. Interpreting the Results n. Some Additional Examples - Chapter Summary I. Related Samples a. To say that two samples are matched or related in some way is to say that the cases included in the samples were not selected independently of one another. i. Before and after test situation- a situation in which the participants are matched against themselves 1. Each person is tested twice and the focus is on any change in the test scores that occurs between the first and second tests. 2. Relation: Same People tested twice ii. Focusing on couples when the question is marriage calls for a matched or related sample approach 1. If we were just looking at random men and women it wouldn’t b. Matched or related samples are samples involving cases or subjects that share certain characteristics in common c. The Logic of the Test i. What constitutes a difference? ii. To find the differences between to tests you subtract Test2- Test1 for each subject and then add all of the differences and divide to get the mean difference pg. 801

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Chapter_8 - Chapter 8 Hypothesis Testing With Two...

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