问题
单项选择题
The power of the test is:（）
A. the probability of rejecting a true null hypothesis.
B. equal to the level of significance.
C. the probability of rejecting a false null hypothesis.
答案
参考答案：C
解析：
This is the definition of the power of the test: the probability of correctly rejecting the null hypothesis (rejecting the null hypothesis when it is false).