Ronnie Hinson has penned the lyrics to some of Southern Gospel music's greatest songs. The Lighthouse is one such song that has indeed stood the test of times. It bears testimony to the power of God's Holy Spirit and His Word to lead wayward souls to the safe harbor of Christ's Grace.
The average absolute deviation (or mean absolute deviation) of a data set is the average of the absolute deviations from a central point. It is a summary statistic of statistical dispersion or variability.
Divide by how many values N and we have: Let's do our example again, using the proper symbols: Step 1: Find the mean: Step 2: Find the Absolute Deviations: Step 3. Find the Mean Deviation: Note: the mean deviation is sometimes called the Mean Absolute Deviation (MAD) because it is the mean of the absolute deviations.