Refer to Example 7.8. In example The consumer testing agency was interested in evaluating whether there was
Question:
In example
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.
Transcribed Image Text:
五=ΣΣ(z,-%)2=1.742.6 and T2=ΣΣ(h"ぴー1,978.4 50- 40 30- 20 10 0 申 申 Additive Additive 2 Additive 3 (a) Boxplots for three additives
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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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