In recent​ years, there has been a great deal of interest in the ads that appear during a game. These ads vary in length with most lasting 30 seconds or 60 seconds. The accompanying table contains the ad length and ad scores from a recent game.

For the​ 30-second ads and the​ 60-second ads​ separately:
a. Compute the​ mean, median, and mode.
b. Compute the​ variance, standard​ deviation, range, and coefficient of variation.
c. Based on the mean and​ median, are the data​ skewed? If​ so, how?
d. Based on the results of​ (a) through​ (c), what conclusions can you reach about the scores of​ 30- and​ 60-second ads?

Company 1
60
6.886.88
Company 2
30
6.656.65
Company 3
30
6.646.64
Company 4
30
6.516.51
Company 5
30
6.266.26
Company 6
30
6.206.20
Company 7
60
6.126.12
Company 8
60
6.086.08
Company 9
60
6.016.01
Company 10
30
5.945.94
Company 11
60
5.735.73
Company 12
60
5.595.59
Company 13
60
5.595.59
Company 14
30
5.595.59
Company 15
30
5.585.58
Company 16
30
5.435.43
Company 17
60
5.415.41
Company 18
30
5.295.29
Company 19
60
5.335.33
Company 20
30
5.255.25
Company 21
30
5.305.30
Company 22
60
5.225.22
Company 23
30
5.205.20
Company 24
30
5.205.20
Company 25
30
5.115.11
Company 26
30
5.125.12
Company 27
60
5.035.03
Company 28
30
5.065.06
Company 29
30
4.904.90
Company 30
30
4.924.92
Company 31
30
4.914.91
Company 32
60
4.834.83
Company 33
30
4.704.70
Company 34
60
4.704.70
Company 35
30
4.694.69
Company 36
30
4.694.69
Company 37
30
4.694.69
Company 38
30
4.604.60
Company 39
30
4.594.59
Company 40
30
4.484.48
Company 41
30
4.464.46
Company 42
30
4.454.45
Company 43
30
4.364.36
Company 44
30
4.364.36
Company 45
30
4.174.17
Company 46
60
4.214.21
Company 47
30
4.164.16
Company 48
30
4.134.13
Company 49
30
4.134.13
Company 50
30
3.923.92
Company 51
30
3.803.80
Company 52
30
3.573.57
Company 53
30
3.573.57
Company 54
30
3.553.55
Company 55
60
3.463.46
Company 56
60
3.303.30
Company 57
60
3.243.24