Given the following information, calculate the degrees of freedom that should be used in the pooled-variance t test. S12 = 4 S22 = 6 n1 = 16 n2 = 25
A、df = 41;
B、df = 39;
C、df = 16;
D、df = 25
发布时间：2025-11-09 22:00:24
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答案：df = 39
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