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在医疗预防工作中,经常要总结防治工作与科学研究的效果,对一些数字要进行统计处理,现在介绍医用统计中两个最多遇到的问题: 一、“变异性”检查正常人的身高、体重、血压、肺活量等各种生理指标时,会发现虽然同属一个地区,同年龄、性别的正常人,其测量结果也并非完全相同,这种个体差异,就是“变异性”。如测量了两组新生儿的头围,得以下数值
In medical prevention work, we often summarize the effects of prevention and control work and scientific research. We must carry out statistical treatment on some figures. Now we introduce the two problems most commonly encountered in medical statistics: First, the “variability” checks the normal person’s height, Weight, blood pressure, vital capacity and other physiological indicators, will find that although both belong to the same region, the same age, gender, normal people, the measurement results are not exactly the same, this individual difference is “variability.” Such as measuring the head circumference of two groups of newborns, the following values