Correlation

Further Mathematics S.S.S 3 First Term

WEEK 8

Correlation

Performance Objectives

Students should be able to:

1. Calculate rank correlation coefficient of two distributions.
2. Illustrate data on a scatter diagram.
3. Rank a given distribution.

Content

Correlation coefficient is a measure of the degree of association between x  and y . When two variables x  and y  are related, they are said to be correlated. A scatter diagram is a graphic display of bivariate data.

Bavariate Data

A data in which one variable is being observed relative to a particular thing is called univariate data. A bivariate data is one in which two variables are observed in relation to a particular thing. When two variables x  and y  are…