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QUESTION
Estimating noice factor in a hospital 90% confident theat her estimate is correct - standard deviation 4.4 - how large will the sample need to be to...
Estimating noice factor in a hospital 90% confident theat her estimate is correct - standard deviation 4.4 - how large will the sample need to be to get desired information to accurte within .70 decibels. How would I get this done - I am lost
