Q1. Which of the following qualifies as a cumulative distribution function? A) F(1) = 0, F(2) = 0.5, F(3) = 0.5, F(4) = 0. B) F(1) = 0.5, F(2) = 0.25, F(3) = 0.25. C) F(1) = 0, F(2) = 0.25, F(3) = 0.50, F(4) = 1.
Q2. A random variable X is continuous and bounded between zero and five, X 0 ≤ X ≤ 5). The cumulative distribution function (cdf) for X is F(x) = x / 5. Calculate P(2 ≤ X ≤ 4). A) 0.40. B) 1.00. C) 0.50.
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发表于 2009-1-9 10:18
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