1. 

Formulas: 1) x - H x-Ho 2) - 3 ) u , - 4) Xdiff-Hodiff 5) (X1-$2)-0 sdiff S12 52 2 Vn Vn1 n2 6) x t t*- 7) xdiff + t* Saiff 8) ( x 1 - X2 ) + t * S12 + S2 2 9) MSG Vn n1 n2 MSE The statistical question is Are there differences in mean Ages for different models of Porsche? Here is an ANOVA table for "Age" of different models of Porsche cars. ANOVA table Source DF SS MS F-Stat P-value Model 2 138.63555 69.317777 7.7834586 0.0021 Error 28 249.36187 8.9057809 Total 30 387.99742