Question

Is anyone good with math I need to review on what mean absolute deviation is and I forgot.. oof.. we are doing math that involves it.

Answer 1

Mean absolute deviation (MAD) of a data set is the average distance between each data value and the mean. Mean absolute deviation is a way to describe variation in a data set.

1 To find the mean absolute deviation of the data, start by finding the mean of the data set.

2 Find the sum of the data values, and divide the sum by the number of data values.

3 Find the absolute value of the difference between each data value and the mean: |data value – mean|.

4 Find the sum of the absolute values of the differences.

5 Divide the sum of the absolute values of the differences by the number of data values.

Hope this helps:)

Answer 2

See below.

Explanation:

An example will help you understand:

Find the mean absolute deviation of the list of numbers: 3, 5, 7, 11, 12.

First find the mean of the list of numbers = (3+5+7+11+12) / 5 = 38/5 = 7.6.

Now we subtract 7.6 from each of the numbers and Take the Absolute value of the results. This means that if the answer is negative we take the positive value:

3 - 7.6 = -4.6 We take 4.6.

5 - 7.6 = -2.6. We take 2.6.

7 - 7.6 = -0.6, We take 0.6.

11 - 7.6 = 3.4.

12 - 7.6 = 4.4.

Now we add the absolute values and take their mean:

4.6+2.6+0.6+3.4+4.4 = 15.6

Mean Absolute Deviation = 15.6 / 5 = 3.12.

I hope this helps.