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How do you solve this? The length of human pregnancies has an average of 266 days and a standard deviation of 16 day The data

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The length of human pregnancies has an average of 266 days and a standard deviation of 16 day The data is from a so it is a The = 266, and the = 16 A random sample of 9 pregnant women was observed to have an average pregnancy length of 270 days, with a standard deviation of 14 days. The data is from a so it is a The 270, and the = 14

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