Mathematics, 08.04.2020 04:59 bbby2
36 out of 100 randomly selected taxpayers knew about tax incentives for installing energy-saving furnaces. Find a 90% confidence interval for the population proportion who knew about the incentives. (Round to two places after the decimal point.)
Answers: 2
, and a confidence level of 
, we have the following confidence interval of proportions.
.
, z is the value of Z that has a pvalue of 
, so 
.
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