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Consider the following information about a fund. The fund has been in existence for 3 years. Over this period it has achieved a mean monthly return of 3% with a sample standard deviation of monthly returns of 5%. It was expected to earn a 2.5% mean monthly return over the 3-year period. Which test statistic do we use for conducting a test of the hypotheses?
Correct Answer: C
This is a t-test because the population variance is not known. The degrees of freedom is always n - 1 which in this case is 36 months - 1 = 35.