NO.PZ2015120604000050
问题如下:
The table below shows the monthly stock returns of Ivy Corp.
According to the above table , calculate the population standard deviation for Ivy Corp. returns, assuming the population has 6 observations?
选项:
A.8.78%.
B.8.01%.
C.48.06%.
解释:
B is correct
Population variance is 64.2 as calculated in previous question, thus population standard deviation is 8.01, the square root of 64.2.
老师,刚才有一题的问题是“According to the above table ,Calculate the sample standard deviation for Ivy Corp. returns, assuming above tabe includes all samples??”
本题问题是“According to the above table , calculate the population standard deviation for Ivy Corp. returns, assuming the population has 6 observations?”
请问既然样本和总体都为6个观察值,计算起来有什么区别呢?麻烦老师分别列一下计算过程,谢谢!