为何A选项是最不合适的
问题如下图：
选项：
A. 
B. 
C. 
解释：
NO.PZ2015120604000146问题如下Here is a table scribing sample statistifrom two bon' rate of return whiare both normally stributeover the past cas. If investor is consiring whether the varianof bonA is greater th3.24%,whiof the following conclusion is least appropriate (significant level=5%) ?A.It is appropriate to use the F-test.B.The hypothesis is :H0: σ2≤3.24%.C.It is appropraite to use the chi-square test. The chi-square test is useto test hypotheses concerning a single population variance.So C is correct.The null hypothesis cplain whatever you want to reject, so B is correct.题干问选择least appropriate,So choose sample 2在此处是干扰项吧？可以这么理解吗？谢谢
NO.PZ2015120604000146问题如下Here is a table scribing sample statistifrom two bon' rate of return whiare both normally stributeover the past cas. If investor is consiring whether the varianof bonA is greater th3.24%,whiof the following conclusion is least appropriate (significant level=5%) ?A.It is appropriate to use the F-test.B.The hypothesis is :H0: σ2≤3.24%.C.It is appropraite to use the chi-square test. The chi-square test is useto test hypotheses concerning a single population variance.So C is correct.The null hypothesis cplain whatever you want to reject, so B is correct.题干问选择least appropriate,So choose 像这种题目里，问whether……is greater than…… 我怎么判断题目里的人是“希望什么被拒绝或者被检验的”，也就是大于还是小于号怎么判断？
NO.PZ2015120604000146问题如下Here is a table scribing sample statistifrom two bon' rate of return whiare both normally stributeover the past cas. If investor is consiring whether the varianof bonA is greater th3.24%,whiof the following conclusion is least appropriate (significant level=5%) ?A.It is appropriate to use the F-test.B.The hypothesis is :H0: σ2≤3.24%.C.It is appropraite to use the chi-square test. The chi-square test is useto test hypotheses concerning a single population variance.So C is correct.The null hypothesis cplain whatever you want to reject, so B is correct.题干问选择least appropriate,So choose 😯这道题我怎么知道是一个总体还是两个总体呢
NO.PZ2015120604000146 问题如下 Here is a table scribing sample statistifrom two bon' rate of return whiare both normally stributeover the past cas. If investor is consiring whether the varianof bonA is greater th3.24%,whiof the following conclusion is least appropriate (significant level=5%) ? A.It is appropriate to use the F-test. B.The hypothesis is :H0: σ2≤3.24%. C.It is appropraite to use the chi-square test. The chi-square test is useto test hypotheses concerning a single population variance.So C is correct.The null hypothesis cplain whatever you want to reject, so B is correct.题干问选择least appropriate,So choose 题目是不是出错了。。
NO.PZ2015120604000146问题如下Here is a table scribing sample statistifrom two bon' rate of return whiare both normally stributeover the past cas. If investor is consiring whether the varianof bonA is greater th3.24%,whiof the following conclusion is least appropriate (significant level=5%) ?A.It is appropriate to use the F-test.B.The hypothesis is :H0: σ2≤3.24%.C.It is appropraite to use the chi-square test. The chi-square test is useto test hypotheses concerning a single population variance.So C is correct.The null hypothesis cplain whatever you want to reject, so B is correct.题干问选择least appropriate,So choose 这道题为什么bon和bon属于single population 如何和f分布做区别呢
