# A national air traffic control system handled an average of 47,134 flights during 29 randomly selected...

A national air traffic control system handled an average of 47,134 flights during 29 randomly selected days in a recent year. The standard deviation for this sample is 6,238 flights per day.

a. Construct a 99?% confidence interval to estimate the average number of flights per day handled by the system.The 99?% confidence interval to estimate the average number of flights per day handled by the system is from a lower limit of __ to an upper limit of __.

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