Study the Excel 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 its predictors.

	Summary Output
	Regression Statistics
	Multiple R		0.814
	R Square		0.663
	Adjusted R Square		0.636
	Standard Error		51.761
	Observations		28
	ANOVA
			df		SS		MS		F		Significance F
	Regression		2		131567.0243		65783.5121		24.55		0.0000013
	Residual		25		66979.6543		2679.19
	Total		27		198546.6786
			Coefficients		Standard Error		t Stat		P-value
	Intercept		203.3937		67.5177		3.01		0.0059
	X1		1.1151		0.5278		2.11		0.0448
	X2		2.2115		0.5667		3.90		0.0006