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Fall 2011
FORM F
Name
Last:_____________________
First:
______________________
Exam 1:
Ch. 1, 2, 3
Section: ___________________
Directions:
• Put your NAME and SECTION on THIS EXAM and on your SCANTRON.
• Write FORM F on your SCANTRON.
• Each question has exactly one BEST answer.
There are 21 questions.
• You may write on this exam.
There is no scratch paper allowed.
• Each question is worth 5 points for a total of 105 points. This includes 5 bonus points!
• If you have no note page, you must write NO NOTES
on your SCANTRON.
• Put your SCANTRON and PAGE of NOTES inside your EXAM.
When your exam is returned, you will get
back all materials you turned in.
• Turn your cell phone OFF.
Any noise from a cell phone will signal that your exam is over.
•
FAILURE TO FOLLOW ALL OF THE ABOVE INSTRUCTIONS WILL COST YOU THE 5
BONUS POINTS.
1.
According to Approaching Democracy
, by Larry Berman and Bruce Murphy, of the countries in existence
in 2006, 46% were considered free countries and 24% had Muslim majorities.
Of the countries with Muslim
majorities, 6.5% were considered free countries.
Find the probability that a randomly chosen country is a
free country and has a Muslim majority.
A.
0.1104
B.
0.0299
C.
0.1150
D.
0.0156
Questions 2 – 4 refer to the following:
According to a survey published in National Health Statistics in 2009
(
http://www.cdc.gov/nchs/data/nhsr/nhsr015.pdf
), the percent of adolescents aged 12 – 17 in the United
States who had ever tried a smoking a cigarette is 39.9%.
2. Define the population.
A.
All children in the United States
B.
All adolescents aged 12 – 17 in the United States
C.
All high school students in the United States
D.
All adolescent smokers between age 12 – 17 in the United States
3. The parameter that is of interest here is:
A.
The percent of adolescents aged 12 – 17 in the United States who had ever tried smoking a
cigarette.
B.
The average number of adolescents aged 12 – 17 in the United States who had ever tried smoking
a cigarette.
C. The percent of adolescents aged 1217 in a randomly selected sample who had ever tried smoking
a cigarette.
D. The average number of adolescents aged 1217 in a randomly selected sample.
4. The number of cigarettes smoked on one day is what kind of data?
A. Qualitative
B. Quantitative – continuous
C. Quantitative – discrete
1
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View Full DocumentQuestions 5 – 7 refer to the following:
Suppose a sample of 50 randomly selected students were asked the number of ‘tweets’ they made yesterday.
The results were as follows:
# of “tweets”
Frequency
0
17
1
9
2
3
4
4
5
5
3
6
2
5.
The average and standard deviation are:
A. Average = 1.76, standard deviation = 1.7907
B.
Average = 1.76, standard deviation = 1.7727
C. Average = 3, standard deviation = 2.16
D. Average = 2, standard deviation = 2
6.
A histogram of the data will be
A. Skewed left
B. Skewed right
C. Bimodal
D. Symmetric
7.
What percent of the students sent at least 4 ‘tweets’?
A. 20%
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 Fall '11
 Plum
 Statistics

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