动差

• moment

参考释义

动差 [dòng chā]

• -
• 短语
  动差法 method of moments

例句

1. 矩，动差任意变量的正整数功效的期望值。第一个矩是分配的平均数
   The expected value of a positive integral power of a random variable. The first moment is the mean of the distribution.