Problem:
The rate of return on Cherry Jalopies, Inc., stock over the last five years was 21 percent, 11 percent, -3 percent, 5 percent, and 8 percent. Over the same period, the return on Straw Construction Company's stock was 16 percent, 22 percent, -2 percent, 5 percent, and 18 percent.
Required:
Question: Calculate the variances and the standard deviations for Cherry and Straw.
Note: Please show how to work it out.