# Arithmetic Mean : Grouped Data

Economics

## formula

### Arithmetic Mean by Direct Method

Mean,
Where,
Sum of all the frequencies. This is also denoted by .
Sum of the product of frequencies and corresponding observations.

## formula

### Arithmetic Mean of grouped data using step deviation

Step Deviation Method: Calculating the Mean by using Step Deviation Method.
Mean,
Where,
Class size

The middle value that is assumed as the mean for calculation,
Sum of the frequencies given, can be denoted by .

## formula

### Weighted Arithmetic Mean

If the frequencies of variables be respectively, then

Mean