Over the past three years, a stock returned 15 percent, -2 percent, and 8 percent. What is the variance of these returns?

Group of answer choices

0.0294

0.0144

0.0381

0.0073

A stock has an average return of 12.5 percent and a standard deviation of 2.3 percent. What range of returns would you expect to see 95 percent of the time on this security?

Group of answer choices

10.2 percent to 14.8 percent

7.9 percent to 17.1 percent

3.3 percent to 21.7 percent

5.6 percent to 19.4 percent