Question: This table summarizes several statistics for 36 monthly returns for American Electric Power (ticker AEP) and Microsoft (MSFT) over a three-year period. Column 1 is

This table summarizes several statistics for 36 monthly returns for American Electric Power (ticker AEP) and Microsoft (MSFT) over a three-year period. Column 1 is the monthly return for AEP and Column 2 is the monthly return for MSFT Column 3 is the difference between the monthly return for AEP and the average return for AEP. Column 4 is the same for MSFT. Column 5 is Column 3 squared and Column 6 is Column 4 squared. Column 7 is the product of Column 3 and Column 4. The bottom row contains the sum of each column. Several rows are not displayed to save space. What is the standard deviation of the AEP monthly returns?

	A.	0.039
	B.	0.041
	C.	0.043
	D.	0.045

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