判断题
Statistical independence means the outcome of one event is independent of the outcome of a second event.
【参考答案】
正确
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单项选择题
X is a discrete random variable that can have values from 0 to infinity, and occurrences of the events X counts are independent. The standard deviation of X is equal to the square root of the mean. The probability distribution of X is a(n) （）distribution.
A.binomial
B.uniform
C.normal
D.Possion
