Question: Assume that the diameter or oak trees in a forest is normally distributed with a mean of 4 feet and standard deviation of .7 feet. What is the probability that a randomly selected oak tree will have diameter greater than 5 feet?

What is the probability that a randomly selected oak tree will have diameter between 4 and 5 feet?

What would the 90 ^th percentile for oak tree diameters?

If I randomly selected 40 oak trees, what is the probability their mean diameter exceeds 4.1 feet?

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