Find the mean, range, and s-hat X 20 19 18 17 16 15 14 Use the following scores: X 10 9 8 7 6 5 4 3 f 2 4 4 3 3 1 S 2 2 4 7 4 0 2 1 a. Compute sigma b. Compute s-hat c. S-hat is larger than sigma. Why does this occur? d. What is the variance (use your value for s-hat)? The following hypothetical data were obtained from a random sample of first year college students. They represent attitude scores toward the statement "Handguns should be registered" with higher scores indicating greater favorability towards regulation. The investigator was interested in the variability of attitudes among first year college students on this question. 11 6 7 6 5 4 9 10 a. Arrange the data into a simple frequency distribution b. Calculate the range c. Find the appropriate standard deviation 7