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The mean weight for 20 randomly selected newborn babies in a hospital is 7.91 pounds with standard deviation 2.30 pounds. What is the upper value

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The mean weight for 20 randomly selected newborn babies in a hospital is 7.91 pounds with standard deviation 2.30 pounds. What is the upper value for a 95% confidence interval for mean weight of babies in that hospital (in that community)? (Answer to two decimal points, but carry more accuracy in the intermediate steps - we need to make sure you get the details right.)

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