Test Version ID
:
A
1
MGSC 291

Sample Test 2
1. Please write your name on the top of this test paper.
2. On the Bubble Answer Form, please fill in the following information:
a) Your name
b) Last 4 digits of your SSN in the Student ID Number section (leave the 5th column blank).
c) Fill in the bubbles below your 4digit SSN.
3. Turn in all test materials (test paper, bubble form, formula sheet,
z
and
t
tables) when you are finished.
Failure to follow any of the above instructions will result in a loss of points on the exam.
You may use a calculator and the provided formula sheet,
z
table, and
t
table.
You have 75 minutes to complete the exam.
Each question is worth 5 points and has a single correct answer.
1.
The U.S. Bureau of Labor Statistics reports that the annual expenditure on food and drink for families is normally
distributed with a mean of $6800 and standard deviation of $1500.
Therefore, 46% of families annually spend less
than how much on food and drink?
a)
6650
b)
6316
c)
7284
d)
6950
2.
A population has a mean of $500 and a standard deviation of $22.
Suppose a simple random sample of 35 is
selected from the population and the sample mean is computed.
What is probability that the sample mean
will be
within
$10 of the population mean?
a)
.3472
b)
.6736
c)
.9928
d)
.3264
3.
In an online auction of a Nintendo Wii system, the secret reserve price is uniformly distributed between $180 and
$220.
What is the standard deviation of the reserve price?
a)
6.67
b)
10.0
c)
8.16
d)
11.55
4.
Thirty percent of
privately owned companies are owned by women.
A sample of 200 companies is randomly
selected and the sample proportion owned by women is computed and found to be 32%.
The standard deviation of
the sampling distribution of the sample proportion is 0.0324.
What is the probability of selecting a sample of 200
companies and obtaining a sample proportion of less
than 32% womenowned?
a)
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 Spring '09
 Rollins
 Standard Deviation, U.S. Bureau of Labor Statistics

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