Assessing model performance
To test which approach is best—the whole dataset model or the models for each house age category—you need to calculate some metrics. Here's, you'll compare the coefficient of determination and the residual standard error for each model.
Four models of price versus no. of convenience stores (mdl_all_ages, mdl_0_to_15, mdl_15_to_30, and mdl_30_to_45) are available; dplyr and broom are loaded.
Deze oefening maakt deel uit van de cursus
Intermediate Regression in R
Praktische interactieve oefening
Probeer deze oefening eens door deze voorbeeldcode in te vullen.
# Get the coeff. of determination for mdl_all_ages
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# Get the coeff. of determination for mdl_0_to_15
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# Get the coeff. of determination for mdl_15_to_30
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# Get the coeff. of determination for mdl_30_to_45
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