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Select Analyze > Fit Model. Note that the Personality box is empty.

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Press CTRL, and select Sex, Age, Weight, Runtime, RunPulse, RstPulse, and MaxPulse. Click Add to add these to the Construct Model Effects list. Note that you can select Keep dialog open if you want to have this window available later on. Your Model Specification window should appear as shown in Model Specification Window for Fitness Regression Model.

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Click Run. Partial View of Standard Least Squares Report for Fitness Data gives a partial view of the report.

The plot and reports for the whole model appear in the leftmost report column. The columns to the right show leverage plots for each of the effects that you specified in the model. Due to space limitations, Partial View of Standard Least Squares Report for Fitness Data shows only the column for Sex, but the report shows columns for the other six effects as well. The red triangle menus contain additional options that add reports and plots to the report window. For details about the Standard Least Squares report window, see Fit Least Squares Report in Standard Least Squares Report and Options.
Looking at the pvalues in the Parameter Estimates report, you can see that Runtime, RunPulse, and MaxPulse appear to be significant predictors of oxygen uptake. The next step might be to reduce the model by removing insignificant predictors. See the Stepwise Regression Models section for more information.