yuqijeffery · 2020年08月16日
问题如下：
When discerning the difference between population means, then most accurate test is :
选项：
A.z-test.
B.paired comparisons test.
C.chi-square test.
解释：
B is correct. The t-test in this section is based on data arranged in paired observations, and the test itself is sometimes called a paired comparisons test.
如何从题干可以看出是不independent？
NO.PZ2018062016000142 问题如下 When scerning the fferenbetween population means(samples are not inpennt), then most accurate test is : A.z-test. B.pairecomparisons test. C.chi-square test. B is correct. The t-test in this section is baseon ta arrangein paireobservations, anthe test itself is sometimes callea pairecomparisons test. 请问不是说所有的判断均值的都用t分布吗？里也没有这个啊
pairecomparions test 不是是samples not inpennt吗 可题目里面不是说的是population，不对应，为什么是选这个呢，谢谢
