A:对 B:错 答案: 错 If the population distribution is unknown, in most cases the sampling distribution of the mean can be appr 点我阅读全文
A: the variance is not as accurate a measurement as the standard deviation B:the standard deviation has been corrected f 点我阅读全文
A: square B:absolute value C:minimum D: maximum 答案: square The reason that we prefer the sample standard deviation as 点我阅读全文