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Question 1
Each March, the Current Population Survey is expanded to gather a wider variety of information. On the Bureau of Labor
and Statistics Web site, you can find data from this survey on 14,959 people aged 25 to 64 whose highest level of education
is a bachelor's degree. Think of these people as a population.
Use Table 7.1 in the textbook, starting at line 107, to choose the first three members of the simple random sample.
1. 14893
2. 08708
3. 09297
4.
1. 05756
2. 12531
3. 01927
4.
1. 82739
2. 57890
3. 20807
4.
1. 82739
2. 60940
3. 36009
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Question 2
A CBS News poll surveyed 1344 randomly selected American adults. Of those surveyed, 726 say that their sympathies in
the Middle East situation lie more with the Israelis than with the Palestinians.
Give a 95% confidence interval for the proportion of all Americans whose sympathies in the Middle East situation lie more
with the Israelis than with the Palestinians.
[52.6%, 55.4%]
[51.3%, 56.7%]
[49.9%, 58.1%]
[53%, 55%]
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Question 3
A Gallup poll interviewed 1535 people and found that 59% of Americans regarded gay and lesbian relations as morally
acceptable. Suppose that you want a margin of error half as large as as the one you found in that exercise. How many
people must you plan to interview?
7675
4605
6140
3070
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Question 4
Choose a young adult (age 25 to 34 years) at random. The probability is
 0.12 that the person chosen did not complete high school,
 0.31 that the person has a high school diploma but no further education, and
 0.29 that the person has at least a bachelor's degree.
What must be the probability that a randomly chosen young adult has some education beyound high school but does not
have a bachelor's degree?
0.19
0.28
0.40
0.57
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Question 5
Choose a young adult (age 25 to 34 years) at random. The probability is
 0.12 that the person chosen did not complete high school,
 0.31 that the person has a high school diploma but no further education, and
 0.29 that the person has at least a bachelor's degree.
What is the probability that a randomly chosen young adult has at least a high school education?
0.12
0.28
0.60
0.88
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Question 6
Role-playing games like Dungeons & and Dragons use many different types of dice. Suppose that a balanced four-sided die
has faces marked 1, 2, 3, 4. The intelligence of a character is determined by rolling this die twice and adding 1 to the sum of
the die, since a triangular pyramidal die has no up "side," just a point! What is the probability that the character has
intelligence 7 or higher?
3/16
5/16
3/8
7/16
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Question 7
Abby, Boaz, Carmen, Dani, and Eduardo work in a firm's public relations office. Their employer must choose two of them to
attend a conference in Paris. To avoid unfairness, the choice will be made by drawing two names from a hat. (This is an
SRS of size 2.)
The random drawing makes all choices equally likely. What is the probability of each choice?
1/10
1/5
3/10
2/5
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Question 8
Abby, Boaz, Carmen, Dani, and Eduardo work in a firm's public relations office. Their employer must choose two of them to
attend a conference in Paris. To avoid unfairness, the choice will be made by drawing two names from a hat. (This is an
SRS of size 2.)
What is the probability that Abby is chosen?
1/10
1/5
3/10
2/5
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Question 9
Abby, Boaz, Carmen, Dani, and Eduardo work in a firm's public relations office. Their employer must choose two of them to
attend a conference in Paris. To avoid unfairness, the choice will be made by drawing two names from a hat. (This is an
SRS of size 2.)
What is the probability that neither of the two men (Boaz and Eduardo) is chosen?
3/10
2/5
3/5
4/5
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Question 10
You spin a wheel, which has 10 possible outcomes, and you throw a dice.
You record the pairs: (number spun, number tossed)
What is the sample space? Are all outcomes equally likely?
Sample Space: {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}
Equally likely: Yes
Sample Space: {(s, t) | 1 ≤ s ≤ 16 and 1 ≤ t ≤ 6}
Equally likely: No
Sample Space: {(s, t) | 1 ≤ s ≤ 16 and 1 ≤ t ≤ 6}
Equally likely: Yes
Sample Space: {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}
Equally likely: No
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Question 11
You spin a wheel, which has 10 possible outcomes, and you throw a dice.
You record the sum of the number spun and the number tossed.
What is the sample space? Are all outcomes equally likely?
Sample Space: {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}
Equally likely: Yes
Sample Space: {2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16}
Equally likely: No
Sample Space: {(s, t) | 1 ≤ s ≤ 16 and 1 ≤ t ≤ 6}
Equally likely: Yes
Sample Space: {(s, t) | 1 ≤ s ≤ 16 and 1 ≤ t ≤ 6}
Equally likely: No
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Question 12
A used car dealer has a total of 60 cars in his lot, 40 of them sedans, the rest SUVs, 34 with CD players, the rest with tape
decks. There are 25 Sedans with CD players.
If you randomly pick out a car, how likely is it that you will pick a sedan with a CD player or an SUV with a tape deck?
1/3
2/5
3/5
2/3
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Question 13
A used car dealer has a total of 60 cars in his lot, 40 of them sedans, the rest SUVs, 34 with CD players, the rest with tape
decks. There are 25 Sedans with CD players.
If you randomly pick out a car, how likely is it that you will pick an SUV with a CD player?
1/20
3/20
1/4
7/20
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Question 14
Determine whether the following events are independent or dependent:
 Purchasing a winning lottery ticket in week 1
 Purchasing a winning lottery ticket in week 2
 Purchasing a winning lottery ticket in week 3
Find the probability of purchasing three winning lottery tickets in a row when each ticket has a 1 in 10 chance of being a
winner.
The events are dependent. Thus, we do not have enough information
to compute the probability.
The events are independent.
Probability: 1/10
The events are independent.
Probability: 1/30
The events are independent.
Probability: 1/1000
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Question 15
Suppose that 2% of the students at a particular college are infected with HIV.
If a student has 20 sexual partners over a period of time, what is the probability that at least one of these partners is infected
with HIV?
1/10
1/20
33/100
2/5
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