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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

Problem 3

9.4 t-Test to Compare Two Population Means: Independent Samples (Equal Variances)

Do men and women consume the same average number of vegetable servings per day?  Twenty-five men and twenty-five women were randomly selected to keep a food journal.  The men ate an average of 2.9 servings of vegetables per day with a standard deviation of 0.6 servings.  The women ate an average of 4.3 servings of vegetables per day with a standard deviation of 0.7 servings. Use a 0.05 significance level to test the claim that women eat more servings of vegetables per day than men on average (assume equal variances).   

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