规定的方法使样本能够用作确定统计公差区间的基础，该公差区间可以是双边的，也可以是单边的。它们仅适用于假设样本单位为随机选择且独立的情况，以及分布为正态分布的情况（如果合适，变换变量可能使其为正态分布）。表1和表2适用于总体标准偏差已知的情况，表3和表4适用于均值和标准偏差未知的情况。

Methods are specified enabling a sample to be used as the basis for determining a statistical tolerance interval, which may be two-sided or one-sided. They are applicable only where the sample unity may be assumed to have been selected at random and are independent, and if the distribution is normal (if appropriate, transforming the variate may make it normal). Tables 1 and 2 are applicable to the case where the standard deviation for the population is known, tables 3 and 4 where the mean and the standard deviation are unknown.