The paper “The Effect of Social Class on Brand and Price Consciousness for Supermarket Products” (Journal of Retailing [1978]: 33–42) used the Kruskal– Wallis test to determine if social class (lower, middle, and upper) influenced the importance (scored on a scale of 1 to 7) attached to a brand name when purchasing paper towels. The reported value of the KW statistic was .17. Use a .05 significance level to test the null hypothesis of no difference in the mean importance score for the three social classes.
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