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Predictor
Coef.
StDev.
Constant
20.00
10.00
X1
-1.00
0.25
X2
12.00
8.00
X3
-15.00
5.00
SOURCE
DF
SS
MS
F
Regression
3
7,500.00
Error
18
Total
21
10,000.0
a) Complete the ANOVA table.
b) Carry out a global test of hypothesis, using the 0.05 significance level. Can you conclude that any of the net regression coefficients are different from zero?
c) Carry out a test of hypothesis on each of regression coefficients. Could you delete any of the variables?
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