Today we reviewed mean and median. We also discussed how to find the M.A.D. (Mean Absolute Deviation) and interquartile range. Use the visual aid below to help you find the interquartile range of a set of numbers. Your homework will be a google form that can be found here: https://forms.gle/4Xr7hdmD9vMsL6j48

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

•Find the **absolute value **of the difference between each data value and the mean: **|data value – mean|**

•Find the **sum** of the absolute values of the differences.

•**Divide the sum **of the absolute values of the differences by the **number of data values**.