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Consider independent simple random samples that are taken to test the difference between the
means of two populations. The variances of the populations are unknown but are assumed to be
equal. The sample sizes of each population are n 1 = 53 and n 2 = 61 . The appropriate
distribution to use is the a. t-distribution with df = 112 b. t-distribution with df = 57 C. t-
distribution with df = 113 d. t-distribution with df = 114

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