8A
Submitted by [email protected] on 7/27/2012 11:53:35 AM
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1.
An opinion poll contacts 1161 adults and asks
them, "Which political party do you think has
better ideas for leading the country in the
twenty-first century?"
In all, 696 of the 1161 say, "The Democrats."
The sample in this setting is
A.
all 225 million adults in the United States.
B.
the 1161 people interviewed.
C.
the 696 people who chose the Democrats.

A sample is a part of the population from which we actually collect information.We use a
sample to draw conclusions about the entire population.
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Your Response:
B
2.
A committee on community relations in a college town plans
to survey local businesses about the importance of students as
customers. From telephone book listings, the committee
chooses 150 businesses at random. Of these, 73 return the
questionnaire mailed by the committee. The population for
this study is

The population in a statistical study is the entire group of individuals about which we want
information. A sample is a part of the population
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3.
The Web portal AOL places opinion poll questions next to
many of its news stories.
Simply click your response to join the sample.
One of the questions in January 2008 was "Do you plan to diet
this year?" More than 30,000 people responded, with 68%
saying "Yes".
You can conclude that

A.
about 68% of Americans planned to diet in 2008.
B.
the poll uses voluntary response, so the results tell us little about the population
adults.
C.
the sample is too small to draw any conclusion.
A voluntary response sample is typically biased, so we can draw few conclusions about the
population.
Correct Answer:
B
Your Response:
B
Points Earned:
1/1

4.
You must choose an SRS of 10 of the 440 retail outlets in New
York that sell your company's products. How would you label
this population in order to use Table B?
Points Earned:
1/1

Your Response:
A
5.
You are using the table of random digits to choose a simple
random sample of 6 students from a class of 30 students. You
label the students 01 to 30 in alphabetical order. Go to line 102
of Table B. Your sample contains the students labeled