Refer to Example 7.8. In example The consumer testing agency was interested in evaluating whether there was
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In example
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The consumer testing agency was interested in evaluating whether there was a difference in the mean percentage increases in mpg of the three additives. In Example 7.9, we showed that the data did not appear to have a normal distribution.
a. Apply the natural logarithm transformation to the data. Do the conditions for applying the AOV F test appear to hold for the transformed data?
b. Test for a difference in the means of the three additives using α = .05.
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a A normal probability plot and boxplot of the residuals for the AOV on ...View the full answer
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Related Book For 
An Introduction To Statistical Methods And Data Analysis
ISBN: 9781305465527
7th Edition
Authors: R. Lyman Ott, Micheal T. Longnecker
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