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Assume that in an apple orchard the heights of the trees are normally distributed with a...

Assume that in an apple orchard the heights of the trees are normally distributed with a mean of 14 feet and a standard deviation of 3 feet. Show all work for the following problems.
(a) What is the probability that a randomly selected tree is at least 7 feet tall?
(b) What is the probability that a randomly selected tree is between 14 and 16 feet tall?
Round answers to 4 decimal places.

Math   Statistics-And-Probability   
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