题目
If X is a continuous random variable, the probability of any single value of X is:
选项
A.One.
B.Zero.
C.Determined by the probability distribution function.
D.Determined by the cumulative distribution function.
答案
B
解析
For a continuous distribution p(x) = 0 for all X, only ranges of value of X have positive probabilities.对于所有X的连续分布p（x）= 0，只有X值的范围具有正概率。