Study the Minitab regression output that follows. How many predictors are there? What is the equation of the regression model? Using the key statistics discussed in this chapter, discuss the strength of the model and thepredictors.

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Regression Analysis: Y versus X^, X2, X3, X4 The regression equation is Y -- 55.9 + 0.0105 x, Predictor 0.107 X2 + 0.579 Xz 3-0.870 X4 Coef SE Coef 24.22 0.01049 0.02100 0.10720 0.03503 0.57922 0.07633 0.1498 55.93 2.31 0.025 0.50 0.619 3.06 0.003 7.59 0.000 5.81 0.000 =78. T% Constant 1 0.8695 S= 9.025 R-Sg 80.2% R-Sg (adj ) = Analysis of Variance Source DF MS Regression Residual Error Total 2 55 18088.54522.1 55.520.000 4479.7 5922568.2 81.4