问题如下图：
选项：
A. 
B. 
C. 
D. 
解释：
选项d是什么知识点呢？
NO.PZ2016062402000008问题如下Whiof the following statements about the normstribution is not accurate?Kurtosis equals 3. Skewness equals 1. The entire stribution ccharacterizetwo moments, meanvariance. The normnsity function hthe following expression: f(x)=12πσ2e−12σ2(x−μ)2f{(x)}=\frac1{\sqrt{2\pi\sigma^2}}e^{-\frac1{2\sigma^2}{(x-\mu)}^2}f(x)=2πσ21e−2σ21(x−μ)2Skewness is 0, kurtosis 3, the entire stribution is scribeμ anσ, anthe p.f. is correct.第几部分第几章节呢。？
NO.PZ2016062402000008 No.PZ2016062402000008 (选择题)
mean应该是属于一阶？出题不严谨？
