Question: When comparing the sample means for two unrelated groups we use the: a. correlated-groups t test. b. independent-groups t test. c. Wilcoxon rank-sum test. d.

When comparing the sample means for two unrelated groups we use the:

a. correlated-groups t test.

b. independent-groups t test.

c. Wilcoxon rank-sum test.

d. 2 test of independence.

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