摘要
本文把总体容量为ｎ＋１而均值是同一常数ａ的全部总体分为ｎ类，在每一类总体中证明了标准差比全距、平均差能更充分地利用和反映总体的标志变动信息，因此标准差优于全距和平均差．
In ths paper an populations with same sample size n+1 and same constant sample mean a are arranged into n types. for each type it is proved that standard deviation can more fully utilize and express the informations of the variation of samples than total distance or nean deviation, therefore standard deviation is more advantageous than the latter two.
出处
《五邑大学学报（自然科学版）》
CAS
1994年第1期34-38,共5页
Journal of Wuyi University(Natural Science Edition)
关键词
标准差
全距
平均差
正交变换
等高线
Standard deviation
total distance
mean deviation
orthogonal transformation
contour line
