Arithmetic Mean Formula
Formula
Summary
The arithmetic mean calculates the average of a sample space. To calculate the arithmetic mean, sum together the elements in the sample and then divide by the number of elements.
Expression  Description 

The arithmetic mean.  
The number of samples in the data.  
the value of the element at the ith position. 
Usage Notes
The arithmetic mean is the average value of a sample space. To calculate the arithmetic mean sum all the data points in a sample space and then divide by the number of elements.
This example shows how to calculate the mean of a data set of numbers.
Steps

Calculate the sum of the elements.

Divide by the size of the data set.

The mean (average) is .