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, X The regression equation is Y -55.9 + 0.0105 X1-0.107 X2 + 0.579 X3-0.870 X4 Coef SE Coef 24.22 0.01049 0.02100 Predictor Constant 2.31 0.025 0.50 0.619 X-0.10720 0.03503 3.06 0.003 7.59 0.000 5.81 0. 000 55.93 0.57922 0.07633 0.8695 0.1498 S= 9.025 R-Sq= 80.2% R-Sq (adj )=78.7% Analysis of Variance Source Regression Residual Error55 Total DF MS 2 18088.5 4522.155.52 0.000 81.4 4479.7 22568.2 59