题目
An investment analyst takes a random sample of 100 aggressive equity funds and calculates the average beta as 1.7. The sample betas have a standard deviation of 0.4. Using a 95% confidence interval and a z-statistic, which of the following statements about the confidence interval and its interpretation is most likely accurate? The analyst can be confident at the 95% level that the interval:
选项
A.0.916 to 2.484 includes the mean of the sample betas.
B.1.622 to 1.778 includes the mean of the sample betas.
C.0.916 to 2.484 includes the mean of the population beta.
D.1.622 to 1.778 includes the mean of the population beta.
答案
D
解析
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