2021年CFA考试《Level Ⅰ》考试题库-CFA考试（Level Ⅰ）-Study Session 3 Quantitative Methods Application-
财会经济-CFA特许金融分析师
阅读理解-The analyst should most appropriately:
Use the following data to answer Questions 58 through 63. An analyst is conducting a hypothesis test to determine if the mean time spent on investment research is different from three hours per day. The test is performed at the 5% level of significance and uses a random sample of 64 portfolio managers, where the mean time spent on research is found to be 2.5 hours. The population standard deviation is 1.5 hours.
阅读理解
A.reject the null hypothesis.
B.fail to reject the null hypothesis.
C.reach no conclusion because the sample standard deviation was not given.
我个人认为这个应该是：A
解析：Decision rule: reject H0 if zcomputed<-1.96 or if zcomputed > +1.96. Since -2.67 < -1.96, reject H0.
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