题目
A Type II error is best described as:
选项
A.rejecting a true null hypothesis.
B.failing to reject a false null hypothesis.
C.failing to reject a false alternative hypothesis.
答案
B
解析
： B is correct. A Type II error occurs when a false null hypothesis is not rejected. ： B正确。 当原假设是错误的，没有拒绝原假设，此时发生第二类错误。