Annualized percentage return on investment (as compared to the Standard & Poor's 500 Index) for 13 randomly selected stock screeners are reproduced in the table.

For Information: Refer to the American Association of Individual Investors (AAII) statistics on stock screeners, Exercise 2.42.
a. Find the range of the data for the 13 stock screeners. Give the units of measurement for the range.
b. Find the variance of the data for the 13 stock screeners. If possible, give the units of measurement for the variance.
c. Find the standard deviation of the data for the 13 stock screeners. Give the units of measurement for the standard deviation.

Transcribed Image Text:

9.0-.1-1.6 14.6 16.0 77 19.9 9.8 3.2 24.8 176 10.7 9.1