常数就是表明数量关系的一种固定数值。所谓统计常数就是由取样材料研究中所获得的数值,用它代表或估计研究对象总体(或群体)质上的特点。这种常数又称为估计常轨数(或参数)。一般统计分析上采用的统计常数有平均数、标准差、变异系数、相关及回归系 A constant is a fixed number that indicates a quantitative relationship. The so-called statistical constants are obtained from the sampling material research values, use it to represent or estimate the study of the overall (or group) qualitative characteristics. This constant is also called the estimated constant orbit (or parameter). The statistical constants used in general statistical analysis are the mean, standard deviation, coefficient of variation, correlation and regression