Consumer Reports rated airlines and found that 75% of
the flights involved in the study arrived on time (i.e., within 15
minutes of scheduled arrival time). Assuming that the on-time
arrival rate is representative of the entire commercial airline
industry, consider a random sample of 220 flights. (Round your
answers to two decimal places.)
(a) What is the expected number that will arrive on time?
(b) What is the standard deviation of this distribution?
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