A national air traffic control system handled an average of 47,673 flights during 28 randomly selected days in a recent year. The standard deviation for this sample is 6,338 flights per day. Complete parts a through c below.
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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