Davis Outboard Motors Inc. recently developed an epoxy painting process for corrosion protection on exhaust components. Bill

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Davis Outboard Motors Inc. recently developed an epoxy painting process for corrosion protection on exhaust components. Bill Davis, the owner, wishes to determine whether the lengths of life for the paint are equal for three different conditions: saltwater, freshwater without weeds, and freshwater with a heavy concentration of weeds. Accelerated-life tests were conducted in the laboratory, and the number of hours the paint lasted before peeling was recorded. Five boats were tested for each condition.

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Use the Kruskal-Wallis test and the .01 level to determine whether the lasting quality of the paint is the same for the three waterconditions.
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Statistical Techniques In Business And Economics

ISBN: 356

16th Edition

Authors: Douglas Lind, William Marchal

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