Thane Company is interested in establishing the relationship between electricity costs and machine hours. Data have been collected and a regression analysis prepared using Excel. The monthly data and the regression output follow:

Month	Machine Hours	Electricity Costs
January	2,700	$	19,300
February	3,100	$	22,800
March	2,100	$	14,400
April	3,300	$	24,800
May	4,000	$	29,150
June	3,500	$	23,800
July	4,300	$	25,650
August	3,700	$	23,650
September	2,200	$	17,300
October	3,900	$	27,800
November	4,900	$	32,800
December	4,400	$	28,650

Summary Output
Regression Statistics
Multiple R	0.954
R Square	0.911
Adjusted R2	0.902
Standard Error	1,645.83
Observations	12.00

	Coefficients	Standard Error	t Stat	P-value	Lower 95%	Upper 95%
Intercept	3,979.06	2,054.03	1.94	0.08	(597.59)	8,555.71
Machine Hours	5.76	0.57	10.11	0.00	4.49	7.03

The correlation coefficient for the regression equation for electricity costs is: