CHAPTER Fifteen
MULTIPLE REGRESSION
MULTIPLE CHOICE QUESTIONS
In the following multiple choice questions, circle the correct answer.
1.
A multiple regression model has the form
Y
= 5 + 6X + 7W
As X increases by 1 unit (holding W constant), Y is expected to
a.
increase by 11 units
b.
decrease by 11 units
c.
increase by 6 units
d.
decrease by 6 units
Answer:
c
31.
For a multiple regression model, SST = 200 and SSE = 50.
The multiple
coefficient of determination is
a.
0.25
b.
4.00
c.
250
d.
0.75
Answer:
d
32.
In a multiple regression analysis involving 10 independent variables and 81
observations, SST = 120 and SSE = 42.
The coefficient of determination is
a.
0.81
b.
0.11
c.
0.35
d.
0.65
Answer:
d
Exhibit 151
1
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document2
Chapter Fifteen
Below you are given a partial Minitab output based on a sample of 25 observations.
Coefficient
Standard Error
Constant
145.321
48.682
X
1
25.625
9.150
X
2
5.720
3.575
X
3
0.823
0.183
1.
Refer to Exhibit 151.
The estimated regression equation is
a.
Y =
β
0
+
β
1
X
1
+
β
2
X
2
+
β
3
X
3
+
ε
b.
E(Y) =
β
0
+
β
1
X
1
+
β
2
X
2
+
β
3
X
3
c.
Y
= 145.321 + 25.625X
1
 5.720X
2
+ 0.823X
3
d.
Y
= 48.682 + 9.15X
1
+ 3.575X
2
+ 0.183X
3
Answer:
c
2.
Refer to Exhibit 151.
The interpretation of the coefficient on X
1
is that
a.
a one unit change in X
1
will lead to a 25.625 unit change in Y
b.
a one unit change in X
1
will lead to a 25.625 unit increase in Y when all other
This is the end of the preview.
Sign up
to
access the rest of the document.
 Spring '10
 SHERMAN
 Regression Analysis, 7w, 42.86%, $4,481.10, $510 2

Click to edit the document details