The standard deviation in Process Capability Index(PCI) is estimated by using the subgroup ranges or the sample standard deviation.
在过程能力分析中通常采用子样级差或样本总体标准差来估计总体标准差。
A new computational formula of fiducial probability in consideration of sample size and subsample standard deviation is derived from the least squares principle.
利用最小二乘原理，推导出考虑样本容量和子样标准差的求解置信概率的函数，继而确定数据的置信区间，对数据进行筛选。
Normally distributed data assumes that about 68% of the values in the sample are within 1 standard deviation of the mean.
正态分布数据认为，样本中约68%的数值分布在距离平均值为1的标准偏差之内。
Measurement of sample: single sample automatic measuring, measuring the number of times 2, 3, 5, 10, 50 set, measured at the end gives the average value and standard deviation.
样品测量：单样品自动测量，测量次数2、3、5、10、50次任意设定，测量结束给出平均值和标准偏差。
The standard deviation of a sampling distribution. It is the statistic used to make statements about the accuracy of estimates based on sample information.
抽样分布的标准偏差。统计学上用来说明从样本预测的数据的准确性。
The detection limits and relative standard deviation of the data are dependent upon the element and sample matrix.
检测限和相关数据的标准偏差取决于元素和样品基体。
The different treatments of the standard sample and sample for detecting will lead to the deviation of analysis result. So the main measures to improve sample representation is to decrease bad sample.
标样和试样处理的差异使分析结果产生偏差，造成碳含量异常的主要原因是试样不良，因此减少试样不良是提高试样代表性的主要措施。
Note: Uncertainty in table is showed by the square minus of the standard deviation from laboratory average data and sample unhomogeneity.
注：表中不确定度以定值标准偏差和样品的不均匀方差表示。
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。
Results Total standard deviation of every solution was less than 5% of the concentration or detection limit. The confident limit of total average rate of recovery in sample kept in range of allowable.
结果各种溶液测定的总标准差小于其浓度的5 %或检出限，总平均回收率可信限在允许范围内。
There had no obvious difference between these two methods, the relative standard deviation was less than 10%, sample recovery rate was 86~119%.
两种方法测定不同类型水中的总铬结果无明显差异，相对偏差均小于10%， 回收率为86～119%。
There had no obvious difference between these two methods, the relative standard deviation was less than 10%, sample recovery rate was 86~119%.
两种方法测定不同类型水中的总铬结果无明显差异，相对偏差均小于10%， 回收率为86～119%。
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