STAT 408
Spring 2009
Name _________________________
AD1
AD2
AD3
Version A
3 – 4
4 – 5
2 – 3
Exam 1
Please circle your discussion section.
Be sure to show all your work; your partial credit might depend on it.
No credit will be given without supporting work.
The exam is closed book and closed notes.
You are allowed to use a calculator and one 8½" x 11" sheet with notes on it.
Page
1
2
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Total
Possible
10
11
9
11
10
9
60
Earned
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1.
The population of Lilliput is divided into LittleEndians and BigEndians based
on which end of a boiled egg they believe should be opened.
Suppose that 60%
of Lilliputians are LittleEndians, and 40 % are BigEndians.
Suppose also that
16% of LittleEndians and 26% of BigEndians have blue eyes.
a)
(4)
What proportion of Lilliput population have blue eyes?
Answer: __________.
b)
(3)
You meet a Lilliputian with blue eyes.
What is the probability that he is a
LittleEndian?
Answer: __________.
c)
(3)
The first democratically elected Lilliputian president is a LittleEndian with blue
eyes.
His first day in office he proposed a tax break for Lilliputians who are
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 Spring '08
 STEPANOV
 Statistics, Probability, Alex, Lilliput and Blefuscu

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