总体平均数

管理人员还会遇到需要检验两个以上的总体平均数是否等同的问题。

Managers also encounter situations in which it is useful to test for the equality of more than two population means .

有证采伐量的调查，其标志值为单位发证采伐量的实际采伐蓄积，以自然村为一阶单元进行总体平均数的不等群抽样估计。

Survey on harvesting rate with certificate adopts non-equal cluster sampling estimation of general average number , regarding nature village as the fist rank unit , and its marking value should take actual harvesting volume as harvesting rate by unit certificate .

在设置样地对采伐总量调查时，其标志值应为单位面积的实际采伐量，可用总体平均数的双重分层抽样法估计，其分层因子为地貌和林木地。

The marking value should be actual rate by the unit area , it can estimate by method with dual layering and sampling of the general average number , and layering factor as landform and forest site during the survey for total harvesting rate of setting sample plot .

总体平方平均数的估计

On the estimation of population square mean

正态分布总体的平均数在正态曲线的中心。

The mean of a normally distributed population lies at the center of its normal curve .

在总平均指标的变动分析中，传统的分析方法是从总体上分析组平均数的变动对总平均数变动的影响和各组结构变动对总平均数变动的影响进行分析。

In the change analysis of total average index , the traditional method is to analyze the inference of the change of group average on that of total average , and the inference of the structural change in the groups on the change of total average .

结合实例，介绍了教育实验中总体服从正态分布（方差已知或未知，大、小样本）或总体非正态几种情形下样本平均数与总体平均数间差异显著性的检验方法；

Based on examples , introduces significance of difference test method between sample average and ensemble average in cases of totality submission normal distribution ( variance known of unknown big , small sample ) or totality non - normal distribution in education experiment ;