Q6. A dealer in a casino has rolled a five on a single die three times in a row. What is the probability of her rolling another five on the next roll, assuming it is a fair die? A) 0.167. B) 0.001. C) 0.200.
Q7. The number of ships in the harbor is an example of what kind of variable?
A) Discrete. B) Indiscrete. C) Continuous.
Q8. Which of the following is a discrete random variable? A) The realized return on a corporate bond. B) The amount of time between two successive stock trades. C) The number of advancing stocks in the DJIA in a day.
Q9. Which of the following statements about probability distributions is most accurate?
A) A discrete uniform random variable has varying probabilities for each outcome that total to one. B) A binomial distribution counts the number of successes that occur in a fixed number of independent trials that have mutually exclusive (i.e. yes or no) outcomes.
C) A continuous uniform distribution has a lower limit but no upper limit.
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发表于 2009-1-9 10:14
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