D? 1. Which of the following statements regarding probability is always correct?
a. A probability can range from 0 to 1.
b. A probability close to 0 means the event is not likely to happen.
c. A probability close to 1 means the event is likely to happen.
d. all of the above are correct.
______ 2. According to the classical definition of probability
a. All the events are equally likely.
b. The probability is based on hunches.
c. Divide the number of successes by the number of failures.
d. One outcome is exactly twice the other.
______ 3. The observation of some activity or the act of taking some measurement is called
a. an outcome.
b. an experiment.
c. a probability.
d. an event.
______ 4. The particular result of an experiment is called
a. an experiment.
b. an event.
c. a probability.
d. an outcome.
______ 5. An event is the collection of one or more
a. outcomes.
b. combinations.
c. probabilities.
d. experiments.
C??? 6. If A and B are mutually exclusive events then P(A or B) equals
a. P(A) + P(B) - P(A and B)
b. P(A) - P(B)
c. P(A) + P(B)
d. P(A|B) + P(B|A)
D ??? 7. If A and B are independent events, then P(A and B)) equals
a. P(A) + P(B|A).
b. P(A) * P(B).
c. P(A) + P(B).
d. P(A|B) + P(B|A).
B??? 8. Which formula represents the probability of the complement of event A?
a. 1 + P(A)
b. 1 - P(A)
c. P(A)
d. P(A) -1
______ 9. The simultaneous occurrence of two events is called
a. prior probability
b. subjective probability
c. conditional probability
d. joint probability
______ 10. If the probability of an event is 0.3, that means
a. the event has a 70% chance of not occurring.
b. the complement of the event has a 30% chance of occurring.
c. the event has a 30% chance of not occurring.
d. the complement of the event has a 70% chance of not occurring.
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