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The lengths of lumber a machine cuts are normally distributed with a mean of 99 inches...

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The lengths of lumber a machine cuts are normally distributedwith a mean of 99 inches and a standard deviation of 0.5 inch. ​(a)What is the probability that a randomly selected board cut by themachine has a length greater than 99.11 ​inches? ​(b) A sample of44 boards is randomly selected. What is the probability that theirmean length is greater than 99.11 ​inches?

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Solutionwe are given that The lengths of lumber a machine cuts arenormally distributed with a mean of 99 inches and a standarddeviation of 05 inchesThat is mean Standard Deviation Part a    See Answer
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