It means the study of existence, magnitude and direction of the relation between two or more variables. in technology and in statistics. Correlation is very important. The famous astronomist Bravais, Prof. Sir Fanci’s Galton, Karl Pearson (who used this concept in Biology and in Genetics). Prof. Neiswanger and so many others have contributed to this great subject.

Index

6. 1 Introduction
6. 2 Correlation
6. 3 Types of Correlation
6. 4 Degrees of Correlation
6. 5 Methods of determining correlation
6. 6 Coefficients of Correlation for Bivariate Grouped Data
6. 7 Probable Error
6. 8 Rank Correlation Coefficient
6. 9 Linear Regression