A researcher is interested in estimating the noise levels in decibels at area urban hospitals. She wants to be 90% confident that her estimate is correct. If the standard deviationis 4.13, how large a sample is needed to get the desired information to be accurate within 0.68 decibels?
Margin of error=E=0.68 decibels
Population Standard …
Solution describes the methodology to determine sample size in the given scenario.