Economic Statistics Exam 2
Last name:
March 31, 2009
First name:
PPID:
Section number:
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This exam contains
fifteen
short answer questions
(
worth 6 points each
)
and
three
long answer questions
(
worth 15 points each
)
. Show your work clearly to be eligible
for partial credit. In all problems where you need to make a calculation, simplify your
answer as much as convenient. In questions with multiple parts, you should respond
as if your answers to previous parts were correct.
Some PDFs:
Some probabilities:
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(
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e
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(
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#
μ
)
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P
[
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!
a
]
=
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#
a
f
(
x
)
=
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!
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[
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]
=
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!
X
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f
(
x
)
=
!
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x
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[
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=
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!(
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p
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(1
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Short Questions
(
6 points apiece
)
1. The formal statement of a hypothesis has two parts.
What are these called, and
what does each describe?
2. What is the minimum variance unbiased estimator of the population variance?
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View Full DocumentEcon 400 Midterm 2, page 2 of 7.
3. Each person has a
10%
chance of being left

handed. I have a class of
100
students,
and my classroom has
15
left

handed desks.
What is the chance that I have more
left

handed students than desks?
4. You want to determine whether the earnings of former prison inmates differ
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 Spring '08
 turchi
 Normal Distribution, Variance, Probability theory, probability density function

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