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 (i.e., thinner) tails than the normal distribution.
C.As its degrees of freedom increase, Student’s t-distribution approaches the normal distribution.
答案
B
解析
B is correct. Since it is false, student’s t-distribution has longer (fatter) tails thanthe normal distribution and, therefore, it may provide a more reliable, moreconservative downside risk estimate. 题目要选择错误的选项： 因为与正态分布相比，t分布的尾部是更肥的，因此，它可以提供更可靠、更保守的下行风险估计。故选项B的说法错误的。 故选项B是本题正确的选项。