问题如下:
Which of the following statements about the sampling distribution of a sample mean is correct?
选项:
A.The sampling distribution is the probability distribution including all datas that population including.
B.The sampling distribution is the probability distribution including all possible sample means calculated from samples whose size is different.
C.The sampling distribution is the probability distribution including possible sample means calculated from samples whose size is the same.
解释:
C is correct.
Assume a population includes 500 members. If we select 50 menbers ten times, than distribution of ten sample means form an sampling distribution. .
想问下B和C的区别,这个all改变了什么含义,因为选项的意思我读不太透彻,虽然选对了