The following frequency distribution shows the time (in minutes) that a sample of students uses the computer terminals per day (Give your answers in minutes).
Time Frequency
20 - 39 2
40 - 59 4
60 - 79 6
80 - 99 4
100 - 119 2
a. Compute the mean, the median, and the mode
b. Compute the variance.
c. Compute the standard deviation.
d. Compute the coefficient of variation.