John listens to a variety of music including easy listening

John listens to a variety of music, including easy listening, classical, and pop/rock. These are the lengths of some of his favorite albums for each of these categories:

Easy Listening         Classical         Pop/Rock

39                               67                   47

60                               76                   47

40                               51                   66

56                               51                   50

41                               36                   78

55                                                      61

41

What is the mean deviation of the \"pop/rock\" data set?

Solution

The average of the pop/rock data set is

Xbar = (47+47+66+50+78+61)/6 = 58.16666667

Thus, the table:

Taking the average of the second column,

mean deviation = 10.1666666667 [ANSWER]