五、关于 X~2检验的问题【问】在医学杂志中,常见到在一些统计表里或表的下方载有 X~2等于某一数值和 P>0.05或 P≤0.05等内容,这是什么意思?有什么用途?【答】为了比较某种现象出现的频率的大小或事物内部构成比例(即分布)是否有差别,例如比较两种药物对某病的有效率或比较单眼内斜视与外斜视患者眼球屈光度分布(表1、2),需要从某一种或某一类表1 两种药物治疗某病有效率比较 Five, on the X ~ 2 test questions [Q] In medical journals, it is common to see in some statistical tables or below the table contains X ~ 2 is equal to a certain value and P> 0.05 or P <0.05 and so on, which is What is the purpose? What is the purpose? [A] In order to compare the frequency of a phenomenon or the internal composition of things (ie distribution) is there any difference, for example, comparing the two drugs on the effectiveness of a disease or more monocular esotropia and external Strabismus eyeball refractive power distribution (Table 1, 2), the need for a certain or a certain type of Table 1, two kinds of drugs to treat a disease more efficient