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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 180

Example 180: Is the color of the motorcycle helmet used by riders somehow related to the risk of crash related injuries?  Use the data below to test the claim at the 5% level of significance that the colors of motorcycle helmets are independent of crash injuries.  
                                  Black    White    Yellow/Orange    Totals
Not Injured                 491    377                   31               899
Injured or Killed        213    112                     8                333
Totals                          704    489                  39               1232

 

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