单选题
If the probability of a Type I error decreases, then the probability of: A. incorrectly rejecting the null increases. B. a Type Ⅱ error increases. C. incorrectly accepting the null increases.
【正确答案】
B
【答案解析】If P(Type Ⅰ error) decreases, then P (Type Ⅱ error) increases. A null hypothesis is never accepted. We can only fail to reject the null.