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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

8.5 Small-Sample Test of Hypothesis about a Population Mean

The lifespan for the general population of males born in 1980 is 77 years old.  A worker for the Census Bureau claims that the average lifespan for college professors is greater than 77.  A random sample of 17 deceased college professors had a mean lifespan of 89 and a standard deviation of 9.5 years.  Use a significance level of 10% to test the CB worker’s claim.  If a politician criticizes the results of the test on the grounds that the sample size was too small, is that criticism valid here?

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