题目序号No.PZ2016032801000004
A researcher is examining the mean return on assets of publicly traded companies that constitute an index of 2,000 mid-cap stocks and is testing hypotheses concerning whether the mean is equal to 15%: versus She uses a 5% level of significance and collect a sample of 50 firms. She wants to examine the robustness of her analysis, so she repeats the collection and test of the return on assets 30 times. The results for the samples with the five lowest p-values are given in Exhibit 1.
Using the BH criteria, how many tests are considered significant(at a 5% significance level)?
A: 3 B: 4 C: 5 答案为C
请问答案不应该为14吗？
