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1. If Z is a standard normal random variable, then the value z for which P(-z < Z < z) equals 0.8764 is
A. 1.16 B. 0.3764 C. 1.54 D. 3.08
2. The average height of flowering cherry trees in a nursery is 11 feet. If the heights are normally distributed with a standard deviation of 1.6, find the probability that a randomly selected cherry tree in this nursery is less than 13 feet tall.
A. 0.67 B. 0.89 C. 0.95 D. 0.11
Additional Information
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