sample standard deviation

In this article,we discuss the characters of sample variance and sample standard deviation in sampling distribution of normal general population.

本文论述正态母体抽样中,样本方差及样本标准差的有关性质,并改进统计计算中的一个近似计算公式,通过具体计算,论证修正后的公式优于原来的公式。

is the population (known) standard deviation. If omitted, the sample standard deviation is used

总体标准偏差（已知）。如果忽略，使用样本标准偏差。

Estimates standard deviation based on a sample (ignores logical values and text in the sample)

估算基于给定样本的标准偏差（忽略样本中的逻辑值及字符串）

Calculates standard deviation based on the entire population given as arguments (ignores logical values and text)

计算基于给定的样本总体的标准偏差（忽略逻辑值及字符串）

The square of the standard deviation.

方差标准偏差数的平方

The results indi-cate that the recoveries were100%-105%and the relative standard deviations were less than2.0%.

本方法的回收率为100%~105%,相对标准偏差小于2.0%。

Calculates the standard deviation based on the entire population of selected database entries

以数据库选定项（指定字段中满足给定条件的数据项）作为样本总体，计算数据的标准偏差

Estimates the standard deviation based on a sample from selected database entries

将数据库选定项（指定字段中满足给定条件的数据项）作为一个样本，估算数据的标准偏差

Estimates the standard deviation based on a sample of selected database entries

将数据库选定项（指定字段中满足给定条件的数值）作为一个样本，估算数据的标准偏差．

experimental standard deviation of the mean

平均值的实验标准偏差

Standard deviation, RSD and confidential limit should be reported.

均应报告标准偏差、相对标准偏差和可信限。

Limits and fits--Bases--Part 3: Numerical values tables of standard tolerances and fundamental deviations

GB/T1800.3-1998极限与配合基础第3部分:标准公差和基本偏差数值表

Therefore, the method is easy and quick to operate and of high precision and its standard deviation is below 0.084%.

本法操作简便、迅速、精密度高,平行试验结果标准偏差为±0.084%.

Research on the Approach of "Composite Standard Deviation" of Large Sample Created from Small Sample in Statistics of PE;

小样本合并成大样本的“组合标准差”简易求解新方法及其应用

Some deviations from standards have rather little meaning, and others have a great deal.

某些偏离标准的偏差可能影响不大，而另一些偏差则可能影响很大。

Days± s. d., those without s. d. indicate that only one plant reached flowering stage.

* 数字为平均±准偏差；若无标准偏差，表示该温度下仅有一植株开花。

standard deviation of the arithmetic mean of a series of measurements

测量列算术平均值的标准（偏）差

standard deviation of weighted arithmetic mean

加权算术平均值的标准（偏）差

The relative standard deviation should be no greater than 2.0%.

其相对标准偏差也应不大于2.0%。