Data Processing

These are statistical averages that give

These are statistical averages that give a single value representing a set of observations. They lie near the centre of a distribution and show the po

Mean is the value obtained by

Mean is the value obtained by summing all values and dividing by the number of observations. It is represented by X̄ and can be found by direct or ind

Median is a positional average

Median is a positional average that divides an arranged series into two equal parts. For ungrouped data it is the (N+1)/2th item, and for grouped data

Mode is the value that occurs

Mode is the value that occurs most frequently in a distribution. It is symbolised as Z or M0. A set may be unimodal, bimodal, trimodal, multimodal, or

For ungrouped data

For ungrouped data, all values are added and divided by the number of observations. For grouped data, each class midpoint is multiplied by its frequen