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99% and 95% Confident Population Estimates

The real estate assessor for a county government wants to study various characteristics of single-family houses in the country. A random sample of 70 houses reveals the following:

- Heated area of the house (in square feet): X =1,759, S=380.
- 42 houses have central air-conditioning.

a. Construct a 99% confidence interval estimate of the population mean heated area of the house.
b. Construct a 95% confidence interval estimate of the population proportion of houses that have central air-conditioning.

Solution Summary

Word document attached that finds population mean and proportion of houses with heating and central air conditioning.