NO.PZ2015120604000093
问题如下：
Considering the standard normal distribution, F(0) is equal to:
选项：
A.0.0.
B.0.25.
C.0.5.
解释：
C is correct.
Because standard normal distribution is symmetry, and its mean is zero. So 50% of datas lie in each side of the 0. F(0) = 0.5.
如题，请问老师F(0)是＜0的面积还是≤0的面积？谢谢
