Exam 2 Review

Exam 2 Review - Stat 145: Exam 2 Review Questions Note:...

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Stat 145: Exam 2 Review Questions Note: This is not intended to be a preview of the actual exam. Rather, it is meant to give you an idea of the types of questions that will be asked. There are concepts in these review problems that will not appear on the actual exam, just as there will be concepts on the actual exam that are not covered in these review problems. 1. A scatterplot of average weekly household spending (in British pounds) on alcohol vs. average weekly household spending (in British pounds) on tobacco in the 11 regions of Great Britain appears below. (a) Will the correlation r between the two variables move closer to 0 or 1 if the the observation in the lower right-hand corner of the plot (marked with an “x”) is removed? Explain your answer. (b) If average weekly household spending on alcohol and average weekly household spending on tobacco were converted from British pounds to U.S. dollars, would the value of the correlation r change? Why or why not? 2. In the early part of the 20th century it was noticed that, when viewed over time, the number of crimes increased with membership in the Church of England. What is the most likely explanation for this?
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3. Government statisticians in England conducted a study of the relationship between smoking and lung cancer in 25 occupational groups. “Smoking” is a ratio that is 100 if men in an occupation are exactly average in their smoking, below 100 if they smoke
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This test prep was uploaded on 04/02/2008 for the course STAT 145 taught by Professor Allstats145 during the Summer '07 term at New Mexico.

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Exam 2 Review - Stat 145: Exam 2 Review Questions Note:...

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