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Course Documents

Chapter 1 - Intro

Chapter 2 - Methods for Describing Sets of Data

Chapter 3 - Probability

Chapter 4 - Discrete Random Variables

Chapter 5 - Normal Random Variables

Chapter 6 - Sampling Distributions

Chapter 7 - Confidence Intervals

Chapter 8 - Tests of Hypothesis: One Sample

Chapter 9 - Confidence Intervals and Hypothesis Tests: Two Samples

Sample Exam I: Chapters 1 & 2

Sample Exam II: Chapters 3 & 4

Sample Exam III: Chapters 5 & 6

Sample Exam IV: Chapters 7 & 8

Example 130.5

Example 130.5: A researcher wants to test the claim that the mean happiness score for married couples is greater than 2.5 on a three point scale (1 = not very happy,2 = pretty happy, 3 = very happy).  The significance level for the test is 0.01.

What is the probability of the type one error?

If the p-value for the test turned out to be 0.0004, what is the initial conclusion?  What possible error (type I or II) could have been committed after forming that conclusion?

If the p-value for the test turned out to be 0.0301, what is the initial conclusion?  What possible error (type I or II) could have been committed after forming that conclusion?

 

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