Fitting a Line in MINITAB^{TM}
Chapter 4, Printout 1
Section 1: Making a Fitted Line Plot
 Launch MINITAB.
 Enter the data.
 Name Column C1 by clicking the blank column label and typing "Pressure"
 Name Column C2 "Density"
 In Column C1, enter the pressure data from the "x" column in Table 4.1 (p. 124).
 In Column C2, enter the density data from the "y" column of Table 4.1.
Screenshot:
 Generate the fitted line plot.
 Select "Stat > Regression > Fitted Line Plot."
 Fill out the resulting dialog box as follows:
Input Type 
Label 
Value 

Response (Y): 
Density 

Predictor (X): 
Pressure 

Linear 
selected 
Screenshot:
 Click "OK."
MINITAB displays a fitted line plot of Density vs. Pressure.
Screenshot:
Section 2: Obtaining the Fitted Equation and Additional Numerical Summaries
 Display summary information for the fitted line.
 Select "Stat > Regression > Regression."
 Fill out the resulting dialog box as follows:
Input Type 
Label 
Value 

Response: 
Density 

Predictors: 
Pressure 
Screenshot:
 Before closing the dialog box, click "Results."
 In the dialog box that follows, click the radio button next to the label, "In addition, the full table of fits and residuals."
Screenshot:
 Click "OK" to close the "Results" dialog box.
 Click "OK" in the "Regression" dialog box.
MINITAB displays summary information, including the regression equation and a table of fits and residuals.
Screenshot:
Section 3: Generating Additional Plots
 Display a normal plot of residuals, residuals vs. fits, and residuals vs. pressure.
 Select "Stat > Regression > Regression."
 Fill out the resulting dialog box as described in Section 2.
 Before closing the dialog box, click "Graphs."
 Fill out the resulting dialog box as follows:
Input Type 
Label 
Value 

Regular 
selected 

Histogram of residuals 
unchecked 

Normal plot of residuals 
checked 

Residuals versus fits 
checked 

Residuals versus order 
unchecked 

Residuals versus the variables: 
Pressure 
Screenshot:
 Click "OK" to close the "Graphs" dialog box.
 Click "OK" in the "Regression" dialog box.
MINITAB displays a normal plot of residuals, a plot of residuals vs. fits, and a plot of residuals vs. pressure.
Screenshot (normal plot of residuals):
Screenshot (residuals vs. fits):
Screenshot (residuals vs. pressure):