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Unformatted text preview: < Z < 3) 4. If X is a random variable that is normally distributed with mean and variance equal to 25 and 4, respectively, determine: (a) P(X < 27) (b) P(22 < X < 27) 5. Suppose X is a random variable that is normally distributed. What additional information must be known in order to determine a probability such as P(X > 12)? 6. Suppose X is a random variable with mean and standard deviation equal to 14 and 2, respectively. How many standard deviations are the values of (a) X = 19.5 above the mean and (b) X = 7.6 below the mean?...
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- Spring '07