It helps determine whether the residuals (the differences between the observed and predicted values) are normally distributed and if they exhibit heteroscedasticity (non-constant variance). Residual Plot on TI-84 Calculator. This tutorial will walk you through the steps to create a residual plot using a TI-84 calculator. Step 1: Enter the Data. You can use your TI-84 Plus to graph residual plots. A residual plot shows the residuals on the vertical axis and the independent variable on the horizontal axis. What are residuals? Residuals are a sum of deviations from the regression line. Because a linear regression is not always the best choice, residuals help you figure out if your.
A residual plot is used to assess whether or not the residuals in a regression analysis are normally distributed and whether or not they exhibit heteroscedasticity. This tutorial provides a step-by-step example of how to create a residual plot for the following dataset on a TI-84 calculator: Step 1: Enter the Data. First, we will enter the data.. Learn how to create and interpret residual plots using the TI-84 calculator on this YouTube tutorial.