How large sample is needed to get desired noise levels

Reference no: EM13136561

A researcher is interested in estimating the noise levels in decibels at area urban hospitals. She wants to be 99% confident that her estimate is correct. If the standard deviation is 4.09, how large a sample is needed to get the desired information to be accurate within 0.53 decibels? Show all work.

Reference no: EM13136561

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