The Excel AVEDEV function returns the average of the absolute value of deviations from the mean for a given set of data. Average deviation is a measure of variability.
Get sum of squared deviations
=AVEDEV (number1, [number2], ...)
number1 - First value or reference.
number2 - [optional] Second value or reference.
The Excel AVEDEV function calculates the average of absolute deviations from the mean in a given set of data.
Variance and standard deviation functions deal with negative deviations by squaring deviations before they are averaged. AVEDEV handles negative values by working only with absolute values.
This average is called the average absolute deviation. It's an easy way to show variability in a data set, but not as common as variance and standard deviation. One advantage of AVEDEV is that units remain unchanged. If values are centimeters, the absolute average deviation is in centimeters as well.
The Excel VAR function estimates the variance of a sample of data. If data represents the entire population, use the VARP function or the newer VAR.P function. VAR ignores text values and logicals in references.
The Excel DEVSQ function returns the sum of the squared deviations from the mean for a given set of data.
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