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Please explain, thank you. A sample of 13 recent births at a local hospital in a small town has the following birth weights (in ounces):

Please explain, thank you.

A sample of 13 recent births at a local hospital in a small town has the following birth weights (in ounces):

89, 128, 137, 144, 98, 113, 124, 138, 108, 115, 105, 99, 110

a. Compute the sample mean and standard deviation of the birth weights.

b. Assume population distribution of birth weight is approximately normal. Construct the 98 confidence interval to estimate the mean birth weight of all babies born in this town.

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