# Statistics

posted by
**JYD**
.

1. In developing patient appointment schedules, a medical center wants to estimate the mean time that a staff member spends with each patient. Using a value for the population standard deviation of eight minutes, determine:

a. How large a sample should be taken if the desired margin of error is two minutes at a 95% level of confidence?

b. How large a sample should be taken if the desired margin of error is two minutes at a 99% level of confidence?