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Birthweight of individual infants in the US follows normal distribution with mean 120 oz and standard deviation 15 oz. 1. What is the sampling distribution

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Birthweight of individual infants in the US follows normal distribution with mean 120 oz and standard deviation 15 oz. 1. What is the sampling distribution of the mean in samples of size 25 from this population? 2. Suppose the sample mean 579 = 115 oz for one sample of 25 infants. Is this sample unusual? i.e. computep ('2 5 115)

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