Use the kruskal -wallis procedure to analyze the dataa when, Ask an Expert

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Use the Kruskal -Wallis procedure to analyze the data.

a. When would a nonparametric procedure be preferred for data such as these?

b. Suppose it is known in advance of the experiment that bulbs of brands A and C both contain the same kind of filament but brand B bulbs have a different kind of filament. Use orthogonal contrasts to complete the analysis of the rank data.

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