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The mean, or the average, of a numerical data set is one of the measures of center. It is defined as the sum of all of the data values in a set divided by the number of values in the set.
Mean=Sum of Values/Number of Values
The following applet calculates the mean of the data set on the number line. Points can be moved to change the data values.
The mean of a set of numbers x_1, x_2, ..., x_n is generally denoted as x.
x=x_1+x_2+⋯+x_n/n
There are several types of the mean in statistics, such as population mean and geometric mean. The exact name of this mean is the arithmetic mean, but it is often shortened to the mean for simplicity.