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The heights of pecan trees are normally distributed with a mean of 10 feet and a...

The heights of pecan trees are normally distributed with a mean of 10 feet and a standard deviation of 2 feet.

13.Show all work. Just the answer, without supporting work, will receive no credit.

(a)What is the probability that a randomly selected pecan tree is between 9 and 12 feet tall?

(b)Find the 75th percentile of the pecan tree height distribution.

Math   Statistics-And-Probability   
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