The heights of pecan trees are normally distributed with a mean of 10 feet and a standard
deviation of 2 feet.
14. Show all work. Just the answer, without supporting work, will receive no credit.
(a) For a sample of 36 pecan trees, state the standard deviation of the sample mean (the "standard error of the mean"). (Round your answer to three decimal places)
(b) Suppose a sample of 36 pecan trees is taken. Find the probability that the sample mean heights is between 9.5 and 10 feet. (Round your answer to four decimal places)
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