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posted by Michael .
The average commute time via train from the Chicago O'Hare Airport to downtown is 60 minutes with a s=15 minutes. Assume that the commute times are normally distributed. what proportion of commutes would be:
Between 45 and 75 minutes?

First of all, it would seem that yu need the train route. Try some of the following links for inform ation:
http://www.google.com/search?q=train+route+from+Chicago+O%27Hare+Airport+to+downtown&ie=utf8&oe=utf8&aq=t&rls=org.mozilla:enUS:official&client=firefoxa
Sra
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