How do you find a absolute deviation?

To find the absolute deviation of a data point from a central value (usually the mean or median), subtract the central value from the data point and take the absolute value of the result. The formula is |x - c|, where x is the data point and c is the central value. For a dataset, you can calculate the average absolute deviation by finding the absolute deviations for all data points, summing them, and then dividing by the number of data points.