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QUESTION
Health officials would like to determine the mean height of 6 year old children to within plus or minus 0. Results from a previous study found there...
Health officials would like to determine the mean height of 6 year old children to within plus or minus 0.1cm. Results from a previous study found there to be a standard deviation of 1.34cm in heights of 6 year old children. Using a 90% confidence interval, what sample size should be used?
