Fitting a Surface By Least Squares in MINITABTM

Chapter 4, Printout 4


Section 1: Obtaining the Fit Equation and Numerical Summaries

  1. Launch MINITAB.

  2. Enter the data.

    Screenshot: screenshot

  3. Compute the multiple linear regression.

    MINITAB displays summary information, including the regression equation and a table of fits and residuals.

    Screenshot: screenshot


Section 2: Generating Additional Plots

  1. Display a normal plot of residuals, residuals vs. fits, and residuals vs. x1, x2, and x3.

    MINITAB displays a normal plot of residuals, a plot of residuals vs. fits, and plots of residuals vs. x1, x2, and x3.

    Screenshot (normal plot of residuals): screenshot

    Screenshot (residuals vs. fits): screenshot

    Screenshot (residuals vs. x1): screenshot

    Screenshot (residuals vs. x2): screenshot

    Screenshot (residuals vs. x3): screenshot