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Table of Contents

 


 

Confidence Intervals and Significant Test for Slope Coefficients

 

Same general procedure as bivariate model.

 

CI=b1 +/- tcv(sb1)

 

where

 

n = sample size

k = number of independent variables

tcv = critical value from the t sampling distribution

 

df= n-k-1     df=5-2-1

alpha .05, 2-tailed, df=2                       tcv, = 4.303

 

CI = 2.900 +/- 4.303(.490)

 

There is a probability of .95 that the slope of education in the population is between .800 and 5 or $800 and $5,000.

 

 

 

Significance Tests  (2-tailed)

 

Education:             (significant; tb1 > tcv of 4.303)

 

Experience:            (not significant; tb2 < tcv of 4.303)

 

 


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