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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 138

Example 138:  When investigating the link between consuming canned foods and bisphenol A (BPA) levels in people, researchers found that 26 subjects who ate a can of soup everyday for five days had average BPA levels of 20.8 micrograms per liter of urine and a standard deviation of 3.1 micrograms per liter.  For 27 subjects who ate fresh soup, their mean levels were 1.1 micrograms per liter of urine and a standard deviation of 0.5 micrograms per liter.  At the 5% significance level, test the claim that consuming canned soup raises the concentration of BPA in urine (assume BPA levels are normally distributed and do not assume equal variances).

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