1. describe the overlap of the two sets of data.
2. calculate the mean of each data set.
3. calculate the mean absolute deviation (mad) of each data set.
4. which set is more variable? how do you know?

Soil A: 
61, 61, 62, 65
70, 71, 75
81, 82
90

Soil B:
59
63, 69
70, 72, 73, 76, 77, 78
83

They overlap at 70.

Soil A: 61, 61, 62, 65, 70, 71, 75, 81, 82, 90
mean: 71.80
mean absolute deviation: 81.60

Soil B:  59, 63, 69, 70, 72, 73, 76, 77, 78, 83
mean: 72
mean absolute deviation: 54