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(1) Consumer Reports rated airlines and found that 85% of the flights involved in the study arrived on time (that is, within 15 minutes of the scheduled arrival time). Consider a random sample of 200 flights.
a. What is the probability that 175 flights will arrive on time?
b. What is the expected number that will arrive on time?
c. What does this value mean in the context of the problem?
When no natural gas is present the test is accurate 90% of the time. Find the best set of decision for the landowner to maximize her profit.
A survey of 35 grocery stores revealed that the average price of a gallon of milk was $2.98 with a standard deviation of $0.25.
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Briefly discuss the importance of each control chart.
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