question archive An airline wishes to estimate the mean time passengers have to wait for their luggage when arriving at a large airport
An airline wishes to estimate the mean time passengers have to wait for their luggage when arriving at a large airport
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An airline wishes to estimate the mean time passengers have to wait for their luggage when arriving at a large airport . How many passengers must be sampled so that a 9596 confidence interval for the true mean waiting time u will have a maximum margin of sampling error of 0.5 minutes ? A similar study completed the past had standard deviation of 2.16 minutes.
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We know that the 9596 confidence interval for population mean is given by:
We want to find 'n' such that
So, required sample size = 72
Please see the attached file for the complete solution
