Compute the range (R), variance (^2 or s^2), standard deviation ( or s), and coefficient of variation (CV) of the data set.

Sample (Grouped Data) Table 4 Grouped Frequency Distribution For the Entrance Exam Scores of 60 Students Class Interval X 18-23 20.5 6 24-29 26.5 11 30-35 32.5 17 36-41 38.5 14 42-47 44.5 48-53 50.5 3 54-59 56.5 N = 60