A scatter diagram.

The horizontal axis is labeled "Variable X" and numbered 2, 4, 6, and 8. The vertical axis is labeled "Variable Y" and numbered 2, 4, 6, and 8. Each of the 50 observations is shown by a small diamond positioned at that subject's Variable X and Variable Y.

There is a strong relationship between X and Y. When X is small, Y is large. When X is average, Y is small. When X is large, Y is large.

When X = 3, Y = 5. When X = 5, Y ranges from 1.5 to 3. When X = 7, Y = 6.

Back to Clinical Biostatistics: Correlation.

This page maintained by Martin Bland.

Last updated: 30 August, 2006.