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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 133

Example 133:  Tests of the effectiveness of Echinacea in preventing upper respiratory infections in children were conducted in double blind studies.  “Days of Fever” was one criteria used to test the effectiveness of Echinacea.  Among 337 children treated with Echinacea, the mean number of days with fever was 0.81, with a standard deviation of 1.5 days.  Among 370 children given a placebo, the mean number of days of fever was 0.64 with a standard deviation of 1.16 days (JAMA Vol. 290).  Use a 5% significance level to test the claim that Echinacea affects the number of days with fever.  What is the p-value for the test?

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