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