变量的方差
双语例句原声例句
-
随机变量的方差衡量随机变量值与期望值偏离的程度。
The variance of a random variable measures how far from the expected value its values typically are.
-
本文给出了模糊随机变量的方差这一概念，并讨论了它的一些性质及计算方法。
This paper gives a new concept of variance of fuzzy random variables and discusses it's property and calculation.
-
很容易看到，项目的最开始，所有变量的方差都是高的，并在最后项目快完成时降低了。
It is easy to see that the variance of any of the variables is high at the beginning of the project and low at the end when completion is in sight.
-
Covariance is a measure of how much two variables move together.
协方差衡量的是两个变量一起变动的情况
-
A positive covariance means that the two move together.
一个正值的协方差表示两个变量同向变动
-
Covariance is--we'll call it--now we have two random variables, so cov... I'll just talk about it in a sample term.
协方差是...我们有两个随机变量,x和y的协方差是,从样本的角度来说
应用推荐