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Given the following data from group 1 and group 2

Given the following data from group 1 and group 2:

a. Combine the two datasets in ranked order. Compute the sum of the ranks for group 1, R1. Compute the sum of the ranks for group 2, R2.

b. Compute the U score for each group, U1 and U2, and determine the U_ statistic.

c. Use the Mann–Whitney U statistic to test the null hypothesis that the average is the same for both groups versus the alternative, that the group 1 average is greater than that for group 2. Use a = 0.05.

a. Combine the two datasets in ranked order. Compute the sum of the ranks for group 1, R1. Compute the sum of the ranks for group 2, R2.

b. Compute the U score for each group, U1 and U2, and determine the U_ statistic.

c. Use the Mann–Whitney U statistic to test the null hypothesis that the average is the same for both groups versus the alternative, that the group 1 average is greater than that for group 2. Use a = 0.05.

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