The correlation coefficient (r)=0.835 has a p value of 0.010 which is less than the level of significance of 0.05 henc the null hypothesis is rejected and a conclusion is reached that there is a significant relationship between x and y.

	df	SS	MS	F	Significance F
Regression	2	180,770	90,385	103.3	103.3
Residual	45	39,375	875
Total	47	220,145
		Coefficients	Standard Error	t-stat	p-value
Intercept
Housing Starts	0.76	0.09	8.44	0.0000
Commercial Construction	1.25	0.33	3.78	0.0005

a. At the 5% significance level, are the explanatory variables jointly significant in explaining LumberSales? Explain.

b. At the 5% significance level, is CommercialConstruction significant in explaining LumberSales? Explain.

c. At the 5% significance level, can you conclude that the slope coefficient attached to HousingStarts differs from 1? Explain.