the computer output given here is the result of a stepwise multiple regression a
ID: 3322528 • Letter: T
Question
the computer output given here is the result of a stepwise multiple regression analysis to predict a dependent variable by using six predictor variables. The number of observations was 108. Study the output and discuss the results. How many predictors ended up in the model ? which predictors, if any, did not enter the model?
STEPWISE REGRESSION OF Y ON 6 PREDICTORS, WITH N = 108
STEP 1 2 3 4
CONSTANT 8.71 6.82 6.57 5.96
X3 -2.85 -4.92 -4.97 -5.00
T-RATIO 2.11 2.94 3.04 3.07
X1 4.42 3.72 3.22
T-RATIO 2.64 2.20 2.05
X2 1.91 1.78
T-RARION 2.07 2.02
X6 1.56
T-RATIO 1.98
S 3.81 3.51 3.43 3.36
R-SQ 29.20 49.45 54.72 59.29
THE ANSWERS 4 predictors ,x4 and x5 are not in model.
explain how we get the answer above if there is any culculation please do Do not use Excel for solving or other program
Explanation / Answer
in the final output we see
x3 , x1 , x2 and x6
hence total 4 variables
initially there were 6 variables x1,x2,..x6
out of which 4 are in model (x3 , x1 , x2 and x6 )
hence x4 and x5 are not in model
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