NO.PZ2015120604000052
问题如下:
The table below shows part of the monthly stock returns of Ivy Corp.
Calculate the sample standard deviation for Ivy Corp. returns, assuming above tabe includes all samples??
选项:
A.8.78%.
B.8.01%.
C.77.1%2.
解释:
A is correct
Sample standard devation is 8.78%, the square root of sample variance 77.1%2
如题,或者用什么方法求的方差77.1%?