问题如下图：
选项：
A. 
B. 
C. 
解释：
本题想检验方差A是否等于方差B，那原假设不应该是方差A不等于方差B吗？C应该也是错的啊
NO.PZ2015120604000148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 equto the varianof bonB,whiof the following conclusion is least appropriate (significant level=5%) ?A.It is appropriate to use the χ2 test.B.It is appropriate to use the F-test.C.The null hypothesis is:H0 : σ1 2 =σ2 2 A is correct.The F-test is appropriate to the equality of two inpennt normally stributepopulation variances.χ2 test is appropriate to test whether a varianfrom a normally stributepopulation is equto a certain value. 不是应该用F分布吗？
NO.PZ2015120604000148 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 equto the varianof bonB,whiof the following conclusion is least appropriate (significant level=5%) ? A.It is appropriate to use the χ2 test. B.It is appropriate to use the F-test. C.The null hypothesis is:H0 : σ1 2 =σ2 2 A is correct.The F-test is appropriate to the equality of two inpennt normally stributepopulation variances.χ2 test is appropriate to test whether a varianfrom a normally stributepopulation is equto a certain value. 根据题干内容C是对的么
老师 怎么看出和两个 inpennt的
C应该也是错的啊，为什么C不选
