题目
For a standard normal distribution, which of the following choices is the approximate area under the probability density function from values -1.96 to 1.96?
选项
A.50%
B.66%
C.75%
D.95%
答案
D
解析
The area under a standard normal distribution within -1.96 and 1.96 standard deviation is approximately 95% of the total.在-1.96和1.96标准偏差范围内的标准正态分布下的面积约为总数的95％。