A study was designed to examine the relationship between the TIME (in days) to complete a construction project and SUBCONTRACT, the number of sub-contractors involved. The regression results are given below.

What is R-square for this model?

Summary of Fit

RSquare	0.713
RSquare Adj	0.691
Root Mean Square Error	14.232
Mean of Response	38.333
Observations (or Sum Wgts)	15.000

Analysis of Variance

Source	DF	Sum of Squares	Mean Square	F Ratio
Model	1	6540.018	6540.018	32.286
Error	13	2633.316	202.563	Prob > F
C. Total	14	9173.333		<.0001*

Lack Of Fit

Source	DF	Sum of Squares	Mean Square	F Ratio
Lack Of Fit	8	2251.3157	281.414	3.6834
Pure Error	5	382.0000	76.400	Prob > F
Total Error	13	2633.3157		0.0836

Parameter Estimates

Term		Estimate	Std Error	t Ratio	Prob>|t|
Intercept		-12.321	9.642	-1.28	0.2237
Subcontract		6.439	1.133	5.68	<.0001*

A..844

B.32.286

C.15

D..713