If you do not see an applet here, chances are that you are using Netscape with Mac OS. Not to worry you are only 8 clicks away from viewing this applet.

1. Please download the Apple Runtime for Java available for FREE at (if you already have the Apple Applet Viewer, skip to step 5):


2. Once the program has downloaded, click on the the MRJ2.2.2.smi icon on your desktop.

3. Click on the MRJ Install icon to install the applet viewer.

4. Open the Apple Applet Runner Folder

5. Click on the Apple Applet Runner Icon

6. In the file menu select Open location

5. Copy the URL of this page and paste it into the Location box of the Applet Runner window.

6. Click Open. The applet may take a moment or two to load.

It will be worth your time, I promise!

NOTE: You can also save the applet in your Apple Applet Viewer Favorites if you want to access it more quickly next time. Do the following:

When the applet is loaded, go to the applets menu and select add applet to list.

Statistics: Simple Linear Regression

Typically, a simple linear regression is performed when one wishes to determine the functional linear relationship between an independent variable and a dependent variable. This relationship is best expressed in an equation of the form:

An equation of this form is valuable because it can be used to predict the value of the dependent variable (Y), given a value of the independent variable (X). The slope (b) and the Y intercept (a) of this best fit line are calculated as follows:

Statistics: Simple Linear Regression

Adjust the slope and intercept of the best-fit line to the right:

Notice that the slope and Y-intercept are independent of each other.

Also note that the equation for the best-fit line indicates the functional relationship between the independent and dependent variables, and not how well the points fit to the regression line.