题目
In the step "stating a decision rule" in testing a hypothesis, which of the following elements must be specified?
选项
A.Critical value
B.Power of a test
C.Value of a test statistic
答案
A
解析
A is correct. The critical value in a decision rule is the rejection point for the test. It is the point with which the test statistic is compared to determine whether to reject the null hypothesis, which is part of the fourth step in hypothesis testing. ： A正确。 临界值是决策测试规则中的拒绝点。检验统计量用来决定是否拒绝原假设，这是假设检验的第四步。