# Arithmetic Mean : Ungrouped Data

Economics

## formula

### Mean by Step Deviation method

If is the involved variable, then arithmetic mean of is abbreviated as of and denoted by . The arithmetic mean of by step deviation method:
of =
: Indicates values of the variable .
: Indicates number of values of .
A:Indicates assumed mean.
or
: Step-deviation and : Indicates common divisor
: Indicates size of class or class interval in case of grouped data.