The ages of a random sample of people who attended a recent soccer match are as follows: 23 35 14 37 38 15 45 12 40 27 13 18 19 23 37 20 29 49 40 65 53 18 17 23 27 29 31 42 35 38 22 20 15 17 21 a....

The ages of a random sample of people who attended a recent soccer match are as follows:


23  35  14  37  38  15  45
12  40  27  13  18  19  23
37  20  29  49  40  65  53
18  17  23  27  29  31  42
35  38  22  20  15  17  21


a. Find the mean age.
b. Find the standard deviation.
c. Find the coefficient of variation.