Interacting with Statistics

You can use the following sites to further explore the concepts behind regression analysis.

• Use this Regression Applet to see the effect of outliers. You click your mouse in the graph to create data points. Click near and far from the center of the data to see what influence each point has on the regression line.

• You can use the following Statistics Glossary - Correlation & Regression to review the terms that you encounter in regression analysis.

• The following correlation demo is a very good way to learn what data with different correlations actually look like.
  First, click the 'New Plots' button and you should see four scatter plots. Now match the plots with the correlation values: You choose the plot that you think matches each correlation. Click on 'Answers' to check your work. You can try again by clicking on "New Plots."