How many city residents be surveyed for confidence interval

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Reference no: EM13138443

How many city residents must be surveyed in order to have a 95 percent confidence interval with a precision of plus/minus 3 trips per month. A pilot study found that the standard deviation was 14 trips.

Reference no: EM13138443

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How many city residents be surveyed for confidence interval : How many city residents must be surveyed in order to have a 95 percent with a precision of plus/minus 3 trips per month.

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