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# Definition of Correlation

Correlation is a statistical measure which helps in analyzing the interdependence of two or more variables. In this chapter the dependence between only two variables are considered.

DEFINITION OF CORRELATION

Correlation is a statistical measure which helps in analyzing the interdependence of two or more variables. In this chapter the dependence between only two variables are considered.

1. A.M. Tuttle defines correlation as:

â€śAn analysis of the co-variation of two or more variables is usually called correlationâ€ť

2. Ya-kun-chou defines correlation as:

â€śThe attempts to determine the degree of relationship between variablesâ€ť.

Correlation analysis is the process of studying the strength of the relationship between two related variables. High correlation means that variables have a strong linear relationship with each other while a low correlation means that the variables are hardly related. The type and intensity of correlation is measured through the correlation analysis. The measure of correlation is the correlation coefficient or correlation index. It is an absolute measure.

## Uses of correlation

Â·              Investigates the type and strength of the relationship that exists between the two variables.

Â·              Progressive development in the methods of science and philosophy has been characterized by the rich knowledge of relationship.

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12th Statistics : Chapter 4 : Correlation Analysis : Definition of Correlation |