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a hypothesis regarding the weight of new born infants at a community hospital is that the mean is 231 pounds. A sample of seven infants

a hypothesis regarding the weight of new born infants at a community hospital is that the mean is 231 pounds. A sample of seven infants is randomly selected and their weights at birth are recorded is21.1,26.1,27.1,25.1 and 32.1 pounds.what is the sample standard deviation?"

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