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 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 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 [...]
题目 The following table shows the significance level (α) and the p-value for two hypothesis tests.「huixue_img/importSubject/1564548697830854656.png」In which test should we reject the null [...]
题目 A Type II error is best described as: 选项 A.rejecting a true null hypothesis. B.failing to reject a false null hypothesis. C.failing to reject a false alternative hypothesis. 答案 B [...]
题目 For a small sample from a normally distributed population with unknown variance, the most appropriate test statistic for the mean is the: 选项 A.z-statistic. B.t-statistic. C.χ2 statistic. [...]
题目 A portfolio manager annually outperforms her benchmark 60% of the time. Assuming independent annual trials, what is the probability that she will outperform her benchmark four or more times [...]
题目 Investor believes that the mean price of houses in the area is greater than $135,000. A random sample of 25 houses in the area has a mean price of $139,750. The population standard deviation [...]
题目 Whichof the following tests of a hypothesis concerning the population mean is mostappropriate? 选项 A.A z-test if the population variance is unknown and the sample is small B.A z-test if the [...]
