Posted by **Miae** on Thursday, May 16, 2013 at 8:12pm.

The stem-and-leaf plot shows the heights in centimeters of Teddy Bear sunflowers grown in two different types of soil.

Soil A

65,62,61,61

75,71,70

82,81

90

Soil B

59

63,69

70,72,73,76,77,78

83

a) Describe the overlap of the two sets of data.

b) Calculate the mean of each data set.

1438/20 = 71.9

The mean of each data set is 71.9.

c) Calculate the mean absolute deviation (MAD) of each data set.

12.9, 10.9, 10.9, 9.9, 8.9, 6.9, 2.9, 1.9, 1.9, 0.9, -0.1, -1.1, -3.1, -4.1, -5.1, -6.1, -9.1, -10.1, -11.1, -18.1 / 20; 136/20 = 6.8

The mean absolute deviation (MAD) for each data set is 6.8: Is this correct?

d) Which set is more variable? How do you know?

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