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# 1-The owner of Britten's Egg Farm wants to estimate the mean number of eggs laid per chicken. A sample of 20

chickens shows they laid an average of 20 eggs per month with a standard deviation of 2 eggs per month.

~what is the 95% confidence interval for the population mean?

~Would it be reasonable to conclude that the population mean is 21 eggs? What about 25 eggs?

2-The U.S. Dairy Industry wants to estimate the mean yearly milk consumption. A sample of 16 people reveals the mean yearly consumption to be 60 gallons with a standard deviation of 20 gallons.

~what is the 90% confidence interval for the population mean.

~Would it be reasonable to conclude that the population mean is 63 gallons?

3Merrill Lynch Securities and Health Care Retirement Inc. are two large employers in down-town Toledo, Ohio. They are considering jointly offering child care for their employees. As a part of the feasibility study, they wish to estimate the mean weekly child-care cost of their employees. A sample of 10 employees who use child care reveals the following amounts spent last week.

\$107

\$92

\$97

\$95

\$105

\$101

\$91

\$99

\$95

\$104

~what is the 90% confidence interval for the population mean. Interpret the result.

4-The Greater Pittsburgh Area Chamber of Commerce wants to estimate the mean time workers who are employed in the downtown area spend getting to work. A sample of 15 workers reveals the following number of minutes spent traveling.

29

38

38

33

38

21

45

34

40

37

37

42

30

29

35

~what is the 98% confidence interval for the population mean. Interpret the result.

It would be fairly reasonable to conclude the population mean is 21. It's slightly out of the confidence interval but by 0.12... View the full answer

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