在医学科学研究中,若欲测定几种因素的作用,而每次只针对一种因素进行对照观察,则要分数次进行,这样做,不但人力物力浪费而且看不到各因素之间可能存在的交互作用,更不易找出主要矛盾(因素)。正交试验是一种多因素同时观察并可测知其主要因素的交互作用的实验设计方法,对所观测之结果可采用方差分析法,下面通过实例演算来介绍它。 In the medical science research, to determine the role of several factors, and each time only for a factor in the control of observation, it must be several times, in doing so, not only waste of human and material resources but also do not see the possible existence of various factors Of the interaction, more difficult to find the main contradictions (factors). Orthogonal test is a multi-factor observation and can be observed at the same time the main factor of interaction experimental design method, the results can be observed using analysis of variance, the following examples to introduce it through an example.