2. 9.

Calculating Returns and Variability [LO 12.1] You have observed the following returns on Crash-n-Burn Computer’s shares over the past five years: 8 per cent, −15 per cent, 19 per cent, 31 per cent and 21 per cent.

1. What was the arithmetic average return on the company’s shares over this five-year period?

2. What was the variance of the company’s returns over this period?

The standard deviation?