SOLUTION: A researcher is interested in estimating the noise levels in decibels at area urban hospitals. She wants to be 95% confident that her estimate is correct. If the standard deviatio
Algebra ->
Probability-and-statistics
-> SOLUTION: A researcher is interested in estimating the noise levels in decibels at area urban hospitals. She wants to be 95% confident that her estimate is correct. If the standard deviatio
Log On
Question 459844: A researcher is interested in estimating the noise levels in decibels at area urban hospitals. She wants to be 95% confident that her estimate is correct. If the standard deviation is 4.02, how large a sample is needed to get the desired information to be accurate within 0.58 decibels? Show all work. Answer by stanbon(75887) (Show Source):
You can put this solution on YOUR website! A researcher is interested in estimating the noise levels in decibels at area urban hospitals. She wants to be 95% confident that her estimate is correct. If the standard deviation is 4.02, how large a sample is needed to get the desired information to be accurate within 0.58 decibels?
-----
n = [z*s/E]^2
-----
n = [1.96*4.02/0.58]^2 = 185 when rounded up
===============
Cheers,
Stan H.
=============
(