NO.PZ2018062016000128
问题如下：
Which of the following statements of the level of significance is correct?
选项：
A.A level of significance is described the probability of the Type II error.
B.A level of significance represents a risk of making Type I errors during a hypothesis test.
C.A level of significance can be a stable value during a hypothesis test.
解释：
B is correct. A level of significance is the probability of making Type I error, usually denoted by the Greek letter alpha. The level of significance has usual values but not stable.
前两个答案没看懂什么意思
