What is the mean absolute deviation of Sherwin's homework scores? HELP

Explanation:

First we need to find the mean.

Add up the values to get 20+13+3 = 33+3 = 36

Then divide that sum by 3 because we're dealing with three values

We get 36/3 = 12.

The mean is 12.

From here we subtract the mean (12) from each data value of the set {20,13,3}

So we get these differences

Here's where the term "absolute" comes in. More specifically, we'll use absolute value. This is to ensure we don't get a negative value when we subtract. So whatever results above are negative, we just flip to the positive version when we apply absolute value.

The set of results we got were {8, 1, 9}

Let's compute the mean of this new set

Add up the values: 8+1+9 = 9+9 = 18

Divide by three:  18/3 = 6

The mean absolute deviation is 6.

hope this is what you were asking for!

step-by-step explanation: