00:01
This problem wants us to find the mean absolute deviation of the data in the bar chart below, and we're shown the number of bubbles blown by each gum chewer, and we've already taken the information out from our bar chart to show us how many times for each person.
00:14
And when we're asked to find mean absolute deviation, what we need to do is find the average distance that all of our observations lie away from the mean.
00:24
So the first step to do that is to find the average of the mean of your data set.
00:28
So adding up 4 plus 5 plus 6 plus 1 gives us a total of 16, and then dividing by 4, our number of observations will give us our average, and that average comes out to 4.
00:39
So knowing that our mean is 4, like we said before, what we want to do to find mean absolute deviation is find the average distance that all of our values are away from the mean, which means we want to take all of our observations and subtract the mean individually, and then find those four results, and then find the average of those differences.
00:58
So since we want the average distance from the mean, we're going to take the absolute value of the difference as well.
01:04
So for manuela, we'll have 4 minus our average or mean of 4...