Testing Normality with a Probability Plot

• From the Graph pulldown, select Probability Plots. Another box will appear:
  
• Click OK to move to the next dialog box:
  
• Click on the column that you want to plot (C1 in this case)
  
• The entry for C1 should appear highlighted. Click the Select button.
  
• The data name from column C1 should now appear in the Graph Variables window.
• Click OK to create the probability plot.