NO.PZ2015120604000146
问题如下:
Here is a table discribing sample statistics from two bonds' rate of return which are both normally distributed over the past decades. If an investor is considering whether the variance of bond A is greater than 3.24%,
which of the following conclusion is least appropriate (significant level=5%) ?
选项:
A.
It is appropriate to use the F-test.
B.
The hypothesis is :
C.
It is appropraite to use the chi-square test.
解释:
The chi-square test is used to test hypotheses concerning a single population variance.So C is correct.
The null hypothesis can place in whatever you want to reject, so B is correct.
题干问选择least appropriate,So choose A.
这道题为什么bonda和bondb属于single population 如何和f分布做区别呢