Thursday, July 1, 2010

Can someone please help me with this stats problem

Can someone please help me with this stats problem?
An airline knows that the duration of the flight from Pittsburgh to Minneapolis is uniformly distributed between 120 and 140 minutes. The flight departs at 1:00 p.m. The airline wants the probability that the flight will be late not to exceed .25. What scheduled arrival time should the airline announce?
Mathematics - 1 Answers
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the plane lands between 3:00 pm and 3:20 pm. They announce 3:15, hence it can be late only 25% of the time. (Early 70% and exactly on time 5%. with every minute 1-20 representing 5%) actually 21 minutes are represented so each will be slighly less then 5% so the 5 minute late span represents 23.8 %

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