What does a hypothesis test at the 5% si...

题目

What does a hypothesis test at the 5% significance level mean?

选项

A.P (not reject H_0

H_0 is true)=0.05

B.P (not reject H_0

H_0 is false)=0.05

C.P (reject H_0

H_0 is true)=0.05

D.P (reject H_0

H_0 is false)=0.05

答案

C

解析

The significance level is the probability of committing a type 1 error, or rejecting a correct model. This is also P(reject H0|H0 is true). On the other hand, the type 2 error rate is P(not reject H0|H0 is false).Power represents P(reject H0|H0 is false).Significance level是犯下I类错误或拒绝正确模型的概率。 这也是P（拒绝H0|H0为真）。 另一方面，II类错误率是P（不拒绝H0|H0为假）。能力表示P（拒绝H0|H0为假）。