Question

    Three brands of coffee are rated for taste on a scale of

    1 to 10. Six persons are asked to rate each brand so that there is a total of 18 observations. The appropriate test to determine if three brands taste equally good is
    A Two way analysis of variance Correct Answer Incorrect Answer
    B Wilcoxon rank-sum test Correct Answer Incorrect Answer
    C Spearman rank difference Correct Answer Incorrect Answer
    D Kruskal-Wallis test Correct Answer Incorrect Answer

    Solution

    Kruskal-Wallis test is used to determine whether or not there is a statistically significant difference among the three or more independent groups.

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