Multiple Choice
Two independent simple random samples are taken to test the difference between the means of two populations whose variances are not known, but are assumed to be equal. The sample sizes are n1 = 31 and n2 = 40. The correct distribution to use is the t distribution with _____ degrees of freedom.
A) 73
B) 72
C) 71
D) 69
Correct Answer:
Verified
Correct Answer:
Verified
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