One is to compare the sample mean and the sample variance.

当样本均值大于样本方差时，认为是服从二项分布；

Populations, random samples. Sample statistics, moments of the sample mean and variance.

母体， 随机样本。 样本统计， 样本平均数和变异数的动差。

We can define it in a couple of different ways depending on whether we're talking about sample mean or population mean.

我们有几种不同的方式去定义这个概念，取决于我们指的是，样本均值还是总体均值。

By using the sample mean range( R )instead of standard deviation of the sample( S )in"S " method, the"R " method is obtained in this paper.

在“S”法的基础上，利用样本平均极差R代替“S”法中的样本标准差S ，从而得到了“R”法，并且给出了相应的样本大小，及各种情况下的接收标准。

In this paper the method on T2 control chart, by which the sample mean vectors of several related quality characteristics are controlled simultaneously in a process, is introduced.

介绍了工序中同时控制多个相关质量特性均值向量的T2控制图方法。