Given the following historical returns, what is the standard deviation?  Year 1 = 9%; year 2 = -11%; year 3 = 8%; year 4 = -12%; and year 5 = -9%. The correct answer is 10.56%. How was that found

The last four years of returns for a stock are as shown here: a. What is the average annual return? b. What is the variance of the stock's returns? c. What is the standard deviation of the stock's returns? Note: Notice that the average return and standard deviation must be entered in percentage format. The variance must be entered in decimal format.

A stock had returns of 17.98 percent, −5.22 percent, 20.45 percent, and 8.65 percent for the past four years. What is the variance of the returns?   Multiple Choice   .11626   .01352   .01622   .01802   .00623

Consider the following five monthly​ returns:   0.04 −0.03 0.03 0.07 −0.02   a. Calculate the arithmetic average monthly return over this period. b. Calculate the geometric average monthly return over this period. c. Calculate the monthly variance over this period. d. Calculate the monthly standard deviation over this period.