在不少的科研论文中 ,在实验前常分成实验组和对照组 ,要求两组对等。对“实验组和对照组是否对等”问题的检查 ,往往错误的用“两组均数差异的显著性检验”(包括两组标准差的检验 ) ,得到“差异无显著性”时即认为已证明两组是对等的。用这种检验方法是错误的。因开题即发生错 In many research papers, before the experiment is often divided into experimental group and control group, requiring two groups of equal. Examination of the question whether the “equivalence between experimental group and control group” is often incorrectly referred to as “the significant test of the mean difference between the two groups” (including the test of two sets of standard deviations) and the result of “no significant difference” Two groups have been shown to be equal. This test method is wrong. Because of the problem that is wrong