NO.PZ2018062016000145
问题如下：
Which of the following statements on F-test is most appropriate?
选项：
A.
The samples in F-test not random.
B.
F-test conduct the tests concerning differences between the variances of two populations.
C.
F-test is a hypothesis test concerning a parameter.
解释：
B is correct. An F-test is used for tests concerning the difference between the variances of two populations(normally distributed populations) , and the samples are independent and random.
老师能否给一下f test代表总体方差之间差额的那页ppt 没找到
