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Babies: According to a recent report, a sample of 300 one-year-old baby boys in the United States had a mean weight of 25.5 pounds. Assume the population standard deviation is σ = 5.2 pounds.
Part 1 of 3 (a) Construct a 90% confidence interval for the mean weight of all one-year-old baby boys in the United States. Round the answer to at least one decimal place.
A 90% confidence interval for the mean weight in pounds of all one-year-old baby boys in the United States is __ < µ < __
Sagot :
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