题目
A Type I error occurs when the null hypothesis:
选项
A.fails to be rejected when it is false.
B.is rejected when it is false.
C.fails to be rejected when it is true.
D.is rejected when it is true.
答案
D
解析
A Type I error occurs when the null hypothesis is rejected when it is true. A Type II error occurs when the null hypothesis fails to be rejected when it is false. 当原假设为真时拒绝原假设时，会发生I类错误。当原假设为假时未能被拒绝时，会发生II类错误。