Youve observed the following returns on Doyscher Corporations stock over the past five years: 24.9 percent, 13.6 percent, 30.2 percent, 2.3 percent, and 21.3 percent.

What was the arithmetic average return on the stock over this five-year period?

What was the variance of the returns over this period?

What was the standard deviation of the returns over this period?