12-21 Example: Regression with a Dummy Variable Example 12.11: The Electronics World Case Minitab Output Sales = 17.4 + 0.851 Households + 29.2 DM Predictor Coef StDev T P Constant 17.360 9.447 1.84 0.109 Househol 0.85105 0.06524 13.04 0.000 DM 29.216 5.594 5.22 0.001 S = 7.329 R-Sq = 98.3% R-Sq(adj) = 97.8% Analysis of Variance Source DF SS MS F P Regression 2 21412 10706 199.32 0.000 Residual Error 7 376 54 Total 9 21788
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