Babies:According to a recent report, a sample of

360

one-year-old baby boys in the United States had a mean weight of

25.5

pounds. Assume the population standard deviation is

=5.1

pounds.

Part 1 of 3

(a) Construct a

99.5%

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

99.5%

confidence interval for the mean weight in pounds of all one-year-old baby boys in the United States is

<25.4<25.6

.

Part 2 of 3

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

The confidence interval should not be used to estimate the mean weight of all one-year-old babies in the United States.

Part:2 / 3

2 of 3 Parts Complete

Part 3 of 3

(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

22.7

pounds?

It is not likely that the mean weight of all one-year-old boys is less than

22.7

pounds.