Sample size-noise levels at urban hospitals

Reference no: EM1394275

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 4.4, how large a sample is needed to get the desired information to be accurate within 0.65 decibels? Show all work.

Reference no: EM1394275

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