Question: What is the approximate probability of Event 1C happening?
a. .08
b. .32
c. 1/16
d. .20
e. .16
Answer: e. .16
Question: Suppose you are the pilot of a small commercial airplane, and you want to ensure that the plane will carry the load. What statistic would be most useful to you?
a. The mean weight of the passengers.
b. The median weight of the passengers.
c. The modal weight of the passengers.
d. The dispersion of the data representing the weight of the passengers.
e. The standard deviation of the data representing the weight of the passengers.
Answer: a. The mean weight of the passengers.
Question: On one roll of a pair of dice, what is the probability of the points adding up to 4?
a. 1/12
b. 1/6
c. 1/11
d. 1/9
e. 1/8
Answer: a. 1/12
Question: What is the probability of getting at least 1 head on 3 successive tosses of a coin?
a. 1/8
b. 3/4
c. 5/8
d. 15/16
e. 7/8
Answer: e. 7/8
Question: Given Event 3C, what is the probability that both balls are blue?
a. 7/132
b. 1/12
c. 1/9
d. 2/25
e. 1/11
Answer: e. 1/11
Question: Given Event 3B, what is the probability that at least one is either yellow or red?
a. 7/9
b. 5/27
c. 1/3
d. 2/3
e. 22/27
Answer: e. 22/27
Question: To compute the probability of having a fair coin turn up heads four times on four tosses, the theory of probability that would normally be used is the:
a. Conditional theory.
b. Classical (a priori) theory.
c. Subjectivist theory.
d. Relative frequency theory.
e. Relativist theory.
Answer: b. Classical (a priori) theory.
Question: Given Event 2B, what is the probability that the first ball is white and the second is red?
a. 2/3
b. 7/17
c. 4/27
d. 1/6
e. 2/9
Answer: d. 1/6
Question: Suppose that the costs of operating a factory that manufactures copper pipe increase by the following amounts: copper: 6%, labor: 5%, electricity: 4%, taxes: 2%, repairs and maintenance: 3%. By how much have the costs of manufacturing the pipe increased?
a. 20%
b. 4%
c. 6%
d. Less than 2%
e. Less than 6%
Answer: e. Less than 6%
Question: Suppose a poll is taken to determine voter attitude about increasing the state income tax in exchange for increased social services (including welfare). If the poll is confined primarily to the poorer neighborhoods of the state, what results can be expected?
a. The poll would be biased against an increase in the state income tax.
b. The people interviewed would not be candid with their answers.
c. The people would refuse to speak to the interviewer.
d. The poll would be biased in favor of increased social services.
e. The responses would accurately reflect the opinion of the state’s population.
Answer: d. The poll would be biased in favor of increased social services.
Question: One way that pictograms can distort a message is by:
a. Using pastel colors to create the pictogram.
b. Using fluorescent colors to create the pictogram.
c. Blurring the lines of the pictogram.
d. Ignoring the visual effect of a three-dimensional image.
e. Chopping off the bottom of the pictogram.
Answer: d. Ignoring the visual effect of a three-dimensional image.
Question: What is the probability of drawing two hearts from a poker deck (no jokers) if the first card is not replaced before the second is drawn?
a. 13/51
b. 1/16
c. 13/52
d. 1/17
e. 1/32
Answer: a. 13/51
Question: In a poll about creating a publicly funded healthcare program, suppose the question is asked, “Should free healthcare be given to people who are too lazy to work and who have never paid any taxes?” Can the answers to this question be trusted?
a. No, because the question is biased in favor of a negative answer.
b. Yes, because most people are inclined to answer truthfully in a poll.
c. Yes, because the phrasing of a question rarely affects the answer.
d. No, because the question is ambiguous.
e. Yes, if the poll is random.
Answer: a. No, because the question is biased in favor of a negative answer.
Question: What is the probability of getting at least 1 head on 4 successive tosses of a coin?
a. 31/32
b. 7/8
c. 3/4
d. 13/16
e. 15/16
Answer: e. 15/16