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Multiple Choice Question Bank for BUEC 333
(copyright 2006, Peter Kennedy)
This set of multiple choice questions has been prepared to supply you with a means of
checking your command of the course material. For each week of the course I have tried
to provide questions that cover the full range of material discussed during that week. I
have also tried not to include “duplicate” questions, namely questions that are basically
the same as other questions but, for example, just use different numbers. The questions
range quite widely in character. Some check your knowledge of definitions, some address
implications of concepts, some require finding numbers in tables, some ask you to do
calculations, some are very easy, and some are very difficult. Because of this, not all
questions are such that they are likely to appear on an exam, so how you score on these
questions is not as important as how well you understand the logic of the answers.
Spending quality time on these questions should help your efforts to learn this course
material. My advice is to work through each chapter’s questions after you believe you
have a good command of that chapter’s material, and then if there are any questions for
which you don’t understand why the answer provided is the best answer, make sure you
find out why.
These questions have not been tested, so there may be problems with them. Some
questions may be vague or defective, and some answers may be incorrect. Please bring to
my attention any questions that are messed up.
Week 1: Statistical Foundations I
The next 10 questions refer to a variable x distributed as follows:
x123
Prob(x)
.1
.2
k
1.
The value of k is
a)
.3
b) .5
c) .7
d) indeterminate
2.
The expected value of x is
a)
2.0
b) 2.1
c) 2.6
d) indeterminate
3.
The expected value of x squared is
a)
4.0
b) 6.76
c) 7.2
d) indeterminate
4.
The variance of x is
a)
0.44
b) 0.66
c) 4.6
d) indeterminate
5.
If all the x values were increased by 5 in this table, then the answer to question 2
would be
a)
unchanged
b) increased by 5
c) multiplied by 5
d) indeterminate
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6.
If all the x values were increased by 5 in this table, then the answer to question 3
would be
a)
unchanged
b) increased by 25
c) multiplied by 25
d) none of the above
7.
If all the x values were increased by 5 in this table, then the answer to question 4
would be
a)
unchanged
b) increased by 25
c) multiplied by 25
d) none of the above
8.
If all the x values were multiplied by 5 in this table, then the answer to question 2
would be
b)
unchanged
b) increased by 5
c) multiplied by 5
d) indeterminate
9.
If all the x values were multiplied by 5 in this table, then the answer to question 3
would be
b)
unchanged
b) increased by 25
c) multiplied by 25
d) none of the above
10.
If all the x values were multiplied by 5 in this table, then the answer to question 4
would be
a) unchanged
b) increased by 25
c) multiplied by 25
d) none of the above
The next 17 questions refer to variables X and Y with the following joint distribution
prob(X,Y)
Y=4
Y=5
Y=6
X=1
.1
.05
k
X=2
.05
.1
.1
X=3
.1
.1
.4
11.
The value of k is
a)
0
b) .1
c) .2
d) indeterminate
12.
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 Spring '09
 simonwoodcock

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