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Multiple choice question based on multiple regression.
Below you are given a partial Minitab output based on a sample of 25 observations.
Coefficient Standard Error
Constant
145.321
48.682
X1
25.625
9.150
X2
-5.720
3.575
X3
0.823
0.183
1. The estimated regression equation is
Y = b0 + b1X1 + b2X2 + b3X3 + e
E(Y) = b0 + b1X1 + b2X2 + b3X3
= 145.321 + 25.625X1 - 5.720X2 + 0.823X3
= 48.682 + 9.15X1 + 3.575X2 + 0.183X3
2. The t value obtained from the table to test an individual parameter at the 5% level is
1. 2.06 2. 2.069 3. 2.074 4. 2.80
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