Checking the model fit

Figure 1. ANOVA table
ANOVA table that shows sum of squares, degrees of freedom, mean square, F, and significance.

The ANOVA table reports a significant F statistic, indicating that using the model is better than guessing the mean.

Figure 2. Model summary table
Model summary table showing an R-square value of .486.

As a whole, the regression does a good job of modeling sales. Nearly half the variation in sales is explained by the model.

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