Mean = average number in a list of numbers. to calculate mean, you have to add up all of the numbers in the list and then divide the sum by how many numbers are in the list. MAD (mean absolute deviation) = the average distance from the mean. How to calculate MAD (very complicated): Find the mean of all of the numbers in the list. Then, subtract the numbers of the list minus the mean. After that, find the absolute values of the differences. Finally, find the mean of the list of absolute values. boom. yo answer.
