单选题 Which of the following statements about hypothesis testing is TRUE? A Type Ⅱ error is the probability of:
  • A. rejecting a true null hypothesis.
  • B. rejecting a true alternative hypothesis.
  • C. failing to reject a false null hypothesis.
【正确答案】 C
【答案解析】The Type Ⅱ error is the error of failing to reject a null hypothesis that is not true.