在第六版HANDBOOK中关于假设检验两种类型错误的描述里(第66页),有一句话: for a given test,increasing the significance level will decrease the probability of a type 1 error but increase the probability of a type 2 error .这句话我一直觉得有些矛盾,应该是 显著性水平增加, type 1 error 的概率也增加吧?
sorry我看反了,书上选a是对的,significance level减小,e.g.5%--->1%, P(type I error) 也就减小了,这就是a答案的意思。B和D都是错的,BD反过来才对,P(TYPE I ERROR) DECREASE, P(TYPE II ERROR) INCREASE
那这道题不是跟这句话相互矛盾了吗?“for a given test,increasing the significance level will decrease the probability of a type 1 error but increase the probability of a type 2 error“