This tutorial was designed to help you understand
the nature of the linear relationship captured
by correlation and regression analysis.

This tutorial assumes that you know scales
of measurement and the basic concepts
used in correlation and regression. Its emphasis is on the visual
representation of linear relationships. It does not address the statistical
formulas used to calculate correlation and regression statistics.

A graph that shows the relationship between two
variables is called a scatter diagram or scatter plot. In this tutorial, you
will generate a series of scatter plots that show different types of relationships.
You must have Microsoft Excel installed on your
computer in order to do the tutorial. When you begin to work with the scatterplots,
you will receive a message asking if you want to enable the "macro"
function within Microsoft Excel. You must answer "yes" in order
to do the tutorial.

Students enrolled in PSYC230
- Elementary Statistics - who wish to receive extra credit for doing
the tutorial should submit the five scatter plots that you generate in this
exercise to Dr. Bliwise. The scatter plots must be submitted before Exam #4
(Correlation and Regression).