If a decision maker wishes to test whether four independent populations have the same center and is unwilling to make the assumption that the populations are normally distributed with equal variances, she can use the Kruskal-Wallis test.

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Quizplus · Accepted Answer

The Kruskal-Wallis test is a non-parametric method used to determine if there are statistically significant differences between the medians of three or more independent groups. It does not assume normal distribution or equal variances, making it suitable for the scenario described.

If a Decision Maker Wishes to Test Whether Four Independent