On a scale designed to measure attitude toward racial segregation, two college classes scored as follows: Class

Question:

On a scale designed to measure attitude toward racial segregation, two college classes scored as follows:
Class A Class B
4……………….. 4
6……………….. 3
2……………….. 2
1……………….. 1
1……………….. 4
1……………….. 2
Compare the variability of attitudes toward racial segregation among the members of the two classes by calculating for each class (a) the range, (b) the variance, and (c) the standard deviation. Which class has greater variability?