An asset had annual returns of 13, 10, -14, 3, and 36 percent, respectively, for the past five years. What is the standard deviation of these returns?

You own a stock that has produced an arithmetic average return of 7.8 percent over the past five years. The annual returns for the first four years were 16, 11, -19, and 3 percent, respectively.

What was the rate of return on the stock in year five?