一些书籍和教学习题在作卡平方检验以后,往往得出这样的结论:假设成立或不成立,说明样本能够推论总体或者不能够推论总体。从卡平方检验的原理来看,卡平方检验不仅不能得到样本能否推论总体的结论,而且说明相关习题对样本总体之间的关系作了错误的理解,由此引起了本文对样本与总体关系的思考。 Some books and teaching exercises in the test for the square after the card, often come to this conclusion: Hypotheses or not established, indicating that the sample can deduce the overall or can not infer the population. According to the principle of square test of card, the square test of card not only can not get the conclusion that the sample can deduce the general conclusion, but also shows that the related exercises have misunderstand the relationship between the whole sample, Thinking.