Review case of the overbooking of airline seats

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Question: Overbooking of airline seats has now become a major problem for everyone who flies, because in order to stay profitable despite rising fuel costs, airlines now fly at an unprecedented average seat occupancy of 85%.18 The following are the results, occupancy rates and counts, for some flights. Assume these data represent a random sample, and test the assumption that occupancy rates are normally distributed given that the mean is 85% and the standard deviation is 5%.

Range (%):               65-70      71-75       76-80       81-85       86-90       91-95

Count
(number of flights):       21            18          11             9             5             4

Reference no: EM131710188

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