Refer to the video below for steps for doing this on your calculator.
Remember to investigate a residual plot to confirm whether your proposed regression models the data well.
Be aware that, when fitting a linear regression model to a set of data, the residuals are automatically stored in a list called RESID. Make sure that your regression diagnostics are turned on. It is unlikely that you will be asked to draw a scatterplot on the exam however, being familiar with creating and analyzing a scatterplot of bivariate data could prove crucial. In this post, I have compiled a list of 6 of the most important statistics features to know for the TI-84 Plus CE Graphing Calculator. As you take the AP® Statistics exam, some questions will require the use of a calculator to perform a statistical test, compute a probability, or display a graph.
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