what's the difference between the aa and the root mean square? what is the difference between mean and average what is the difference between the mean and the absolute deviation of a measure what is root mean square average deviation and mean square what is the average absolute deviation and the root mean square? what's the difference between the root mean square and the average absolute deviation? difference in root mean square and absolute deviation what the difference between standard deviation and mean square? difference between the root mean square and average absolute deviation? what the measure of variability what is the avd and root mean square what is the difference between the average absolute deviation and the root median square which is the most accurate measure of variability? why do we use root mean squares and average absolute deviation what is the difference between an absolute and a root mean square average absolute deviation vs root mean square what is the difference between the average mean and the average absolute deviation? how to choose the root mean square root median square vs average absolute deviation