AIM: How can we use measures of variation and center to judge overall performance?
HW: Mean Absolute Deviation worksheet (found below)
Describe what the following are...
Data values in a data set can also be described by their variation, which means how different they are from each other. The Mean Absolute Deviation (M.A.D.) is a measure that describes the variation.
To find the MAD, find the average of the data set. Then take the absolute value of the difference of each data point and the mean. Finally, find the average of all those difference. In essence, the MAD describes the average distance each data point is from the mean. If the MAD is a large number, this means that the data values are spread apart and vary greatly. If the MAD is a small number, the data values are close to each other and do not vary greatly.