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2200年前守护中国历史上第一个皇帝秦始皇陵墓的地下兵马俑的尺寸与现代军队中有最低身高要求的步兵极为相似。这种最低身高要求的规定使士兵身高的分布偏离正态分布,而兵马俑就是这样。假定中国古代士兵招募自一个身高正态分布的人口,而且其标准差与现代值相同,那么,2000多年前中国人的身高估计在162～171厘米之间。
The size of the underground terracotta warriors and horses, who guard the tomb of the First Emperor Qin Shi Huang in the history of China 2200 years ago, closely resembles those of the modern army, which have the lowest height requirements. This requirement of minimum height deviates the normal distribution of soldiers’ height, as is Terra Cotta Warriors. Assuming that the ancient Chinese soldiers were recruited from a normal-height population and that their standard deviations are the same as modern ones, the Chinese’s height was estimated at between 162 and 171 centimeters over 2,000 years ago.