The data for three independent random samples are shown in the table. It is known that the sampled populations are not normally distributed. Use an appropriate test to determine whether the data provide sufficient evidence to indicate that at least two of the populations differ in location. Use a = .05.

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Sample 1 Sample 3 50 64 Sample 2 12 33 10 15 63 34 18 87 53 65 18 32 43 77