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March 29, 2015

Homework Help: statistics help...please

Posted by tanya on Thursday, April 3, 2008 at 11:23am.

i have no idea!
The real estate assessor for a country government wants to study various characteristics of single family houses in the country. A random sample of 70 houses reveals the following: the mean is 1759, standard deviation is 380 and 42 houses have central air conditioning.


How would I construct a 99% confidence interval estimate of the population mean heated area of the houses?


And the construct a 95% confidence interval estimate of the population proportion of houses that have central air conditioning.

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