Most auto batteries are made by just three manufacturersDelphi, Exide, and Johnson Controls Industries. Each makes batteries
Question:
a. Determine if the average length of battery life is different among the batteries produced by the three manufacturers. Use a significance level of 0.05.
b. Which manufacturer produces the battery with the longest average length of life? If warranted, conduct the Tukey-Kramer procedure to determine this. Use a significance level of 0.05.
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Related Book For
Business Statistics A Decision Making Approach
ISBN: 9780133021844
9th Edition
Authors: David F. Groebner, Patrick W. Shannon, Phillip C. Fry
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