在试验数据的统计分析中,经常遇到有关离均差平方和的计算。特别在试验数据的变量分析中,主要计算工作量就是计算各变异原因的离均差平方和,但在计算器的使用说明中只介绍了计算样本标准差σ_(n-1)、总体标准差σ(一般试验资料不用它)、算术平均数χ、数据个数n、数据各数的总和∑χ In the statistical analysis of experimental data, the calculation of the sum of squared deviations from the mean is often encountered. Especially in the variable analysis of the experimental data, the main calculation workload is the square deviation from the average of all the variations, but only the calculation standard deviation σ_ (n-1), the overall standard deviation σ (general test data without it), the arithmetic mean χ, the number of data n, the sum of each data Σχ