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Unformatted text preview: each of the following calculate the probabilities using the standard normal table. a. P(y>80) b. P(y<20) c. P(120 <y< 305.2) d. P(y<28.8) e. P(31.2<y< 23.2) 4.Suppose random variable Y is normally distributed with mean 200 and variance 6400. In each statement find value of A. a. P(y>A)=0.005 b. P(y<A)=0.55 5. Suppose that the following hold true for Y in problem 1. In each statement find values of A and B. Assume that A and B are symmetrical about the mean. a. P(A <y< B)= 0.6826 b. P(A <y< B)= 0.9544 6. Suppose f(z) is the probability density function of standard normal random variable. Evaluate a. 1 . 2 2 . 1 ) ( dz z f Z b. 5 . 5 . ) ( dz z f Z...
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 Spring '08
 Martin
 Economics

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