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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 1

7.2 Large-Sample Confidence Intervals for a Population Mean

A 1993 study of in-state annual tuition rates at public schools in the US drew a random sample of 56 public colleges and universities that had a mean of $2,319 and a standard deviation of $1,136.  Construct the 95% confidence interval for the true mean annual, in-state tuition costs for US colleges and universities in 1993.  In an interview from 1993, a college president claimed the $3,527 per year in-state tuition that his college charged was average for public schools.  Does the interval you created contradict his claim?

 

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