作者Laoda245566 (草莓兽)
看板Statistics
标题[问题] uniform probability distribution
时间Mon Dec 9 15:47:22 2013
1. Delta Airlines quotes a flight time of 2 hours, 5 minutes for its flights
from Cincinnati to Tampa. Suppose we believe that actual flight times are
uniformly distributed between 2 hours and 2 hours, 20 minutes.
a. What is the probability that the flight will be no more than 5 minutes
late?
b. What is the probability that the flight will be more than 10 minutes late?
a.我的算法125-120/20=0.25 但是答案0.5
b.140-130/20 答案0.25
请问错在哪??
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※ 发信站: 批踢踢实业坊(ptt.cc)
◆ From: 140.115.214.9
1F：推 koai:1.(125＋5－120)/20=0.5；2. 1-(125＋10－120)/20=0.25 12/09 16:26
2F：→ Laoda245566:不好意思 可解释一下吗?? 12/09 17:04
3F：推 koai:1.误点不超过5分钟；2.误点超过10分钟！ 12/09 17:25