The Essentials of Biostatistics for Physicians, Nurses, and Clinicians

7.5 Multiple Regression 115

Variable df Parameter Standard T for H 0 :

Estimate Error Parameter

= 0

Prob

|T|
INTERCEP 1 54.757978 14.29169893 3.831 0.0003
NADER 1 0.077460 0.01255278 6.171 0.0001
BUSH 1 0.001795 0.00056335 3.186 0.0023
GORE 1 – 0.000641 0.00040706 − 1.574 0.1205

Model: MODEL1 (using votes for Nader, Bush, and Gore to predict

votes for Buchanan )

Dependent Variable: BUCHANAN

Analysis of Variance

Parameter Estimates

Source df

Sum of

Squares Mean Square F - Value

Prob

> F

Model 3 2777684.5165 925894.82882 114.601 0.0001

Error 62 500914.34717 8079.26366

Total 65 3278598.8636

Root

MSE

89.88472 R 2 0.8472

Dep

Mean

211.04545 Adj R 2 0.8398

C.V. 42.59022

Model: MODEL2 (using votes for Nader and Bush to predict votes

for Buchanan)

Dependent Variable: BUCHANAN

Analysis of Variance

Source df

Sum of

Squares

Mean Square F - Value

Prob

> F

Model 2 2757655.9253 1378827.9626 166.748 0.0001

Error 63 520942.93834 8268.93553

Total 65 3278598.8636

Root

MSE

90.93369 R^2 0.8411