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    99% and 95% Confident Population Estimates

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    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.

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    Solution Summary

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