样本平均数

目前，t检验（t-test）在鸟类栖息地选择分析中被广泛运用于两个独立样本平均数的比较，但它对数据的分布形式要求较严格。

At present T test and single variable variance analysis are often used in analysis on selection of avian habitats to compare the averages of two independent samples .

几种作物田间试验样本平均数估测的样本容量探究

A Study on Sample Size for Estimating Means of Test Plats of Some Field Crops

本文证明了在不放回抽样条件下，样本平均数不仅是总体均值的无偏估计，而且还是相合估计。

In this paper , the author proves that sample average is both the non-deviation estimation and consistent estimation of overall mean value .

采用分层抽样法，以各层样本平均数、变异数，考虑成本及使用戴明配置来定各层抽样数目。

Adopting the method of sampling and dividing data into several layers , we can get sample averages . Does that make variations ? Taking cost into account , we use Dai-Ming method to decide the layers of sampling to dispose data .

简单随机样本平方平均数的分布

On the distribution of root - mean - square value of simple random sample

研究人员取了两组样本的平均数，以得到一个更可靠的数字，从而把年龄和季节因素考虑进去。

The researchers averaged the two samples to get a more reliable figure to take into account age and season .

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 ;