问题如下图：
选项：
A. 
B. 
C. 
解释：
你好，请问一下选项B和C是同一个意思么？谢谢
a t-test of the fferenbetween the two population means. approximate t-test of mefferences between the two populations. A is correct. The sample sizes for both the funmanager anthe consultant’s accounts consists of forty quarterly perio of returns. However, the consultant’s client accounts are a subset of the funmanager’s entire account base. such, they are not inpennt samples. When samples are pennt, a pairecomparisons test is appropriate to contests of the fferences in pennt items 老师，这题是什么意思
老师好，B的意思感觉就是pairecomparisons test的定义啊，pairecomparisons test不就是针对U= u1-u2吗
请问老师，表格里的这些检验对应的名字是Z检验、T检验、X2卡方检验和F检验吗？
提问请问是从题干哪里看出来两者是不独立的事件，即关联事件。谢谢老师
