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wheat yeilds per acre are approximately normal with a mean of 88 bu/A and a standard deviation of 7/bu/A. what percentage of the one-acre plots

wheat yeilds per acre are approximately normal with a mean of 88 bu/A and a standard deviation of 7/bu/A.

what percentage of the one-acre plots have yeilds between 81-95 bu/A?

what percentage of the one acre plots would be expected to have yeilds greater than 100 bu/A?

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