Boys and girls: The National Health Statistics Reports reported that a sample of 311 one-year-old boys had a mean weight of 25.3 pounds with a standard deviation of 3.6 pounds. In addition, a sample...

Boys and girls: The National Health Statistics Reports reported that a sample of

311

one-year-old boys had a mean weight of

25.3

pounds with a standard deviation of

3.6

pounds. In addition, a sample of

287

one-year-old girls had a mean weight of

24.2

pounds with a standard deviation of

4.0

pounds.

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Construct a

confidence interval for the difference between the mean weights. Let

μ1

denote the mean weight of one-year-old boys. Use tables to find the critical value and round the answers to at least one decimal place.

confidence interval for the difference between the mean weights is

Jun 03, 2022

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