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QUESTION
In developing patient appointment schedules, a medical center wants to estimate the mean time that a staff member spends with each patient.
In developing patient appointment schedules, a medical center wants to estimate the mean time that a staff member spends with each patient. How large a sample should be taken if the desired margin of error is two minutes at a 95% level of confidence? How large a sample should be taken for a 99% level of confidence? Use planning value for the population standard deviation of either minutes.
