Q1. Assume a discrete distribution for the number of possible sunny days in Provo, Utah during the week of April 20 through April 26. For this discrete distribution, p(x) = 0 when x cannot occur, or p(x) > 0 if it can. Based on this information, what is the probability of it being sunny on 5 days and on 10 days during the week, respectively? A) A positive value; infinite. B) Zero; infinite. C) A positive value; zero.
Q2. Which of the following is least likely to be an example of a discrete random variable? A) The rate of return on a real estate investment. B) The number of days of sunshine in the month of May 2006 in a particular city. C) Quoted stock prices on the NASDAQ.
Q3. A random variable that has a countable number of possible values is called a: A) probability distribution. B) continuous random variable. C) discrete random variable.
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发表于 2009-1-9 10:15
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