variance of a random variable造句

例句与造句

1. Sometimes these operations are regular expectations that produce the average or variance of a random variable.
2. For example, if they need a prior distribution for the mean and variance of a random variable, they may assume " p " ( " m ", " v " ) ~ 1 / " v " ( for " v " > 0 ) which would suggest that any value for the mean is " equally likely " and that a value for the positive variance becomes " less likely " in inverse proportion to its value.
3. It's difficult to find variance of a random variable in a sentence. 用variance of a random variable造句挺难的