What is the means-to-MAD ratio of the two data sets, expressed as a decimal?

1.44

Data set Mean Mean absolute deviation (MAD)

1 10.7 2.4

2 13.7 2.5

The correct answer for the question that is being presented above is this one:

To find the mean of a set, add up all of the numbers and divide by how many numbers you have. For the first set:

u = (10.7+2.4) / 2 = 6.55

For the second set:

u = (13.7 + 2.5) / 2 = 8.1

To find the mean absolute deviation, (MAD) find the mean of the distances of each number from the mean.

First set:

MAD = (|10.7-6.55| + |2.4-6.55|) / 2 = 4.15

Second set:

MAD = (|13.7-8.1| + |2.5-8.1|) / 2 = 5.6

The means-to-MAD ratio is simply that, divide one by the other and that's it.

For the first set:

6.55 / 4.15 = 1.57831325

For the second set:

8.1 / 5.6 = 1.44642857