Consider the following model: 2. Ely) (Bo+ Biz1+ B2zz) +(B2+ Baz1 + Bsz)x + (B6 +...
Consider the following model: 2. Ely) (Bo+ Biz1+ B2zz) +(B2+ Baz1 + Bsz)x + (B6 + Biz1 +Bsz2)x where 1, category 2 1, category 1 Z2 0, o.w 0, o.w. Below is the Minitab output for this model; use it to answer the following questions. T P Predictor Coef SE Coef -1.52 Constant -0.8365 0.5618 0.133 0.000 0.96327 0.1502 13.80 0.20 0.06980 z1 0.7522 0.7732 0.842 z2 1.7934 2.32 0.023 x 2 0.10888 0.01341 -8.12 0.000 0.06482 0.06783 0.00630 zi x 0.09948 0.65 0.516 z2 x 0.08818 0.77 0.444 z1 x 2 0.01829 0.34 0.731 z2-x 2 0.09402 0.01780 5.28 0.000 S1.88621 R-Sq 95.3% R-Sq(adj) 94.9% Analysis of Variance Source DF Ss MS Regression Renidual Error 8 6586.58 823.32 91 323.76 3.56 Total 99 6910.34 a. Test whether the model is overall useful at an alpha level of .05. Clearly write each step of the test.