问题如下图:
选项:
A.
B.
C.
解释:
没明白,能给一下详细解释吗?
NO.PZ2015120604000052 问题如下 The table below shows part of the monthly storeturns of Ivy Corp.Calculate the sample stanrviation for Ivy Corp. returns, assuming above tainclus all samples?? A.8.78%. B.8.01%. C.77.1%2. A is correctSample stanrvation is 8.78%, the square root of sample varian77.1%2 老师,我计算器输入之后,SX是0.087788,与一致,但是 方差是0.080139,X拔是0.076667也是对的,为啥方差不是C,标准差的平方呢?
NO.PZ2015120604000052 问题如下 The table below shows part of the monthly storeturns of Ivy Corp.Calculate the sample stanrviation for Ivy Corp. returns, assuming above tainclus all samples?? A.8.78%. B.8.01%. C.77.1%2. A is correctSample stanrvation is 8.78%, the square root of sample varian77.1%2 如题,或者用什么方法求的方差77.1%?
你好,题目说包含了所有样本,不就是总体吗?
答案中square root 不是平方根的意思吗?错了吧!