Construct a confidence interval for the mean weight

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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=5.5 pounds.

(a) Construct a 99% 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.

(b) Should this confidence interval be used to estimate the mean weight of all one-year-old babies in the United States? Explain.

(c) Based on the confidence interval constructed in part (a), is it likely that the mean weight of all one-year-old boys is less than 28.3 pounds?

Reference no: EM132907166

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