Mean

The mean is the arithmetic average of the data values. It is the sum of the data values divided by the number of data values.

Population Mean ( $image\u.gif$ )

$image\popmean.gif$

Sample Mean ( $image\mean.gif$ )

$image\sammean.gif$

where

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

Average Deviation

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

Standard Deviation

Standard Error of the Mean

Statistics References