wyrw · 2024年08月04日
NO.PZ2018062016000141
问题如下：
Which of the following statements on a pooled estimator most appropriate?
选项：
A.It's an equality of the variances of two normally distributed populations.
B.It's an estimate drawn from the combination of two different samples.
C.It can only be used in Chi-squared test
解释：
B is correct. A pooled estimate is an estimate drawn from the combination of two different samples. It's used when testing the concerning difference between means.
A选项为何错
NO.PZ2018062016000141 问题如下 Whiof the following statements on a pooleestimator most appropriate? A.It's equality of the variances of two normally stributepopulations. B.It's estimate awn from the combination of two fferent samples. It conly usein Chi-squaretest B is correct. A pooleestimate is estimate awn from the combination of two fferent samples. It's usewhen testing the concerning fferenbetween means. 题目中combination of two fferent samples，这个表述是关联的吧？
NO.PZ2018062016000141 问题如下 Whiof the following statements on a pooleestimator most appropriate? A.It's equality of the variances of two normally stributepopulations. B.It's estimate awn from the combination of two fferent samples. It conly usein Chi-squaretest B is correct. A pooleestimate is estimate awn from the combination of two fferent samples. It's usewhen testing the concerning fferenbetween means. pooleestimate体是指什么啊
NO.PZ2018062016000141 问题如下 Whiof the following statements on a pooleestimator most appropriate? A.It's equality of the variances of two normally stributepopulations. B.It's estimate awn from the combination of two fferent samples. C.It's only usein t-test. B is correct. A pooleestimate is estimate awn from the combination of two fferent samples. It's usewhen testing the concerning fferenbetween means. 谢谢
请问A怎么翻译呀？C错在哪了，不就只在t分布时候提及吗？
