standard deviation of sample的意思|示意

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。

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。

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。

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。

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。

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。