How many returns to know the proportion of bond issue

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Reference no: EM13134543

he mayor of a small town would like to know whether a local bond issue is likely to pass or not. He mails a survey to 500 randomly selected voters. How many returns must he get in order to know the proportion that will support the bond issue within a standard error of 5% and a confidence level of 95%?

Reference no: EM13134543

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