Table 2.

Regression model summary.

Model	R	R 2	Adjust R2	Standard error	Durbin–Watson
1	0.754a	0.568	0.565	0.285
2	0.829b	0.687	0.683	0.243
3	0.87c	0.756	0.751	0.215
4	0.878d	0.771	0.765	0.209
5	0.884c	0.781	0.774	0.205	1.604