Calculating Returns and Variability

You’ve observed the following returns on Mary Ann Data Corporation’s stock over the past five years: 12 percent, –12 percent, 19 percent, 24 percent, and 10 percent.

a. What was the arithmetic average return on Mary Ann’s stock over this five-year period? (Do not round intermediate calculations and round your final answer to 2 decimal places. (e.g., 32.16))

Average return %

b-1. What was the variance of Mary Ann’s returns over this period? (Do not round intermediate calculations and round your answer to 5 decimal places. (e.g., 32.16161))

Variance   

b-2. What was the standard deviation of Mary Ann’s returns over this period? (Do not round intermediate calculations and round your final answer to 2 decimal places. (e.g., 32.16))

Standard deviation %