Regression Analysis (Model I:)

Variable

Coefficient

Std. Error

t-Statistic

Prob.

C

71.20066

38.02481

1.87248

0.063

DPS

12.64378

1.133567

11.154

0

RE

3.565653

1.181167

3.01875

0.003

R-Squared

0.500217

Mean Dependent Var

319.263

Adjusted R-Squared

0.49393

S.D. Dependent Var

568.909

S.E. of Regression

404.7137

Akaike info Criterion

14.8626

Sum Squared Resid

26043112

Schwarz Criterion

14.9198

Log Likelihood

−1200.869

F-Statistic

79.5689

Durbin-Watson Stat

2.034496

Prob(F-Statistic)

0

Regression Analysis (Model II:)

Variable

Coefficient

Std. Error

t-Statistic

Prob.

C

70.69989

38.26786

1.8475

0.0665

DPS

12.62898

1.140748

11.0708

0

RE

3.567237

1.184842

3.01073

0.003

0.100145

0.620627

0.16136

0.872

R-Squared

0.500299

Mean Dependent Var

319.263

Adjusted R-Squared

0.490811

S.D. Dependent Var

568.909

S.E. of Regression

405.9589

Akaike info Criterion

14.8748

Sum Squared Resid

26038821

Schwarz Criterion

14.951

Log Likelihood

−1200.856

F-Statistic

52.7297

Durbin-Watson Stat

2.034608

Prob(F-Statistic)

0

(Model III:)

Variable

Coefficient

Std. Error

t-Statistic

Prob.

C

19.98011

33.93348

0.5888

0.5568

DPS

6.048764

1.352993

4.47065

0

RE

2.827333

1.035434

2.73058

0.007

0.515242

0.072155

7.14078

0

R-Squared

0.622157

Mean Dependent Var

319.263

Adjusted R-Squared

0.614982

S.D. Dependent Var

568.909

S.E. of Regression

353.0067

Akaike info Criterion

14.5952

Sum Squared Resid

19688971

Schwarz Criterion

14.6715

Log Likelihood

−1178.214

F-Statistic

86.7209

Durbin-Watson Stat

1.968415

Prob(F-Statistic)

0