Average Deviation

The average deviation is the average of the difference between the absolute values of data points and the mean.

Population Mean Deviation (MD) 

image\popmd.png

Sample Mean Deviation (MD)

image\sammd.png

where

image\u.png

= Population Mean

image\mean.png

= Sample Mean

N

= number of data values (for a population)

n

= number of data values (for a sample)

xi

= ith data value

See Also

Data Statistics

95% and 99% Confidence Interval for the Mean

Coefficient of Kurtosis

Coefficient of Skewness

Coefficient of Variation

Critical Value of K-S Statistic at 90%, 95%, and 99% Significance Level

Kolmogorov-Smirnov Goodness of Fit Statistic for Normal Distribution

Mean

Standard Deviation

Standard Error of the Mean

Statistics References

Variance