Davis Outboard Motors Inc

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.

Use the Kruskal-Wallis test and the .01 level to determine whether the lasting quality of the

paint is the same for the three water conditions.

Saltwater Freshwater freshwater with weeds

167.3 160.6 182.7

189.6 177.6 165.4

177.2 185.3 172.9

169.4 168.6 169.2

180.3 176.6 174.7