Ch4
Student: ___________________________________________________________________________
1.
For the equation
Y
=
a
+
bX,
the objective of regression analysis is to
A. estimate the parameters
a
and
b
.
B. estimate the variables
Y
and
X
.
C. fit a straight line through the data scatter in such a way that the sum of the squared errors is minimized.
D. both
a
and
c
E. all of the above
2.
In a linear regression equation of the form
Y
=
a
+
bX,
the slope parameter
b
shows
3.
In a linear regression equation of the form
Y
=
a
+
bX
, the intercept parameter
a
shows
4.
In a regression equation, the ______ captures the effects of factors that might influence the dependent
variable but aren't used as explanatory variables.
5.
The sample regression line
A. shows the actual (or true) relation between the dependent and independent variables.
B. is used to estimate the population regression line.
C. connects the data points in a sample.
D. is estimated by the population regression line.
E. maximizes the sum of the squared differences between the data points in a sample and the sample
regression line.
6.
Which of the following is an example of a timeseries data set?
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7.
The method of least squares
8.
In a linear regression equation
Y
=
a
+
bX,
the fitted or predicted value of
Y
is
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 Spring '10
 HAMZA
 Statistics, Regression Analysis, a. b. c., b. c. d.

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