对青海汉、撒拉、土、回四民族女生月经初潮年龄的统计分析

THE STATISTICAL ANALYSIS OF THE AVERAGE AGES OF THE FIRST MENSES IN FEMALS STUDENTS OF HAN SALA HUI TU NATIONALITICES

女生月经初潮的年龄统计分析，是衡量女生身体发育的重要指标，１９８５年我省在学生体质调研中，曾对女生月经初潮进行过回顾性凋查，但缺乏民族间的对比分析。本文根据最小二乘法原理建立回归方程，以此求半数月经初潮年龄，再计算初潮年龄的９５％置信区间。

ummany The Satistical analysis is the majos inden to measure the Physical development of Female Students In 1985,there was a retrospective investigation of Famale Students First menses in the physical investigation and research to students in Qinghai Province,but it lacks Contrastive analysis among the Different nationahties On the basis of the Smallest double multiplication and regressive equation the Witers Have evaluated,half of Average ages of First Menses and then Calcuated 95% helievable distrit.