A regional town-planning department wants to determine the proportion of residential houses in its region that have
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A regional town-planning department wants to determine the proportion of residential houses in its region that have air conditioning. To do so, a random sample of 80 houses across the region is selected and 56 of those are found to have air-conditioning. From these data, what is the 95% confidence interval for the proportion of residential houses that have air conditioning in this region? What effect would an increase in the confidence level have on this estimate?
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Related Book For 
Business Analytics And Statistics
ISBN: 9780730363330
1st Edition
Authors: Ken Black, John Asafu Adjaye, Paul Burke, Nelson Perera, Carl Sherwood, Saleh A. Wasimi
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