题目 In contrast to normal distributions, lognormal distributions: 选项 A.are skewed to the left. B.have outcomes that cannot be negative. C.are more suitable for describing asset returns than [...]
题目 A portfolio has an expected mean return of 8 percent and standard deviation of 14 percent. The probability that its return falls between 8 and 11 percent is closest to: 选项 A.8.3% B.14.8%. [...]
题目 Compared with bootstrap resampling, jackknife resampling: 选项 A.is done with replacement. B.usually requires that the number of repetitions is equal to the sample size. C.produces [...]
题目 When evaluating mean differences between two dependent samples, the most appropriate test is a: 选项 A.z-test. B.chi-square test. C.paired comparisons test. 答案 C 解析 C is correct. A [...]
题目 Which one of the following statements about Student’s t-distribution is false? 选项 A.It is symmetrically distributed around its mean value, like the normal distribution. B.It has shorter [...]
