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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 149

Example 149:  Disney is comparing two methods of receiving customers at its City Halls in the Magic Kingdom and Disney Land.  They are deciding if using one long line (used in Disney Land) is better than allowing people to line up in separate lines for each teller (used in Magic Kingdom).  They collected waiting time data (measured in minutes) for both locations:

 

Test the claim at the 5% significance level that Disney Land “City Hall” lines have a smaller variance than the lines at “City Hall” in Magic Kingdom.

 

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