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Science Forum Index » Statistics - Education Forum » help me
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| rdavtyan |
 Posted: Sat Feb 02, 2008 8:20 am |
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Suppose the Jet's quarterback has a 60% probability of completing 20
or more passes in a Football game, and a 40% probability of completing
less than 20 passes. With 20 or more completions, the Jets have an 80%
probability of winning the game. But, with less than 20 completions,
the probability of winning falls to 40%. If the Jets win the next
game, what is the probability that the quarterback completed more that
20 passes? |
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| Kenneth M. Lin |
| Posted: Sun Feb 03, 2008 8:23 pm |
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If Jets has already won, you can watch ESPN and find out how many passes
were completed.
"rdavtyan" <rdavtyan@hotmail.com> wrote in message
news:9334ebad-6b45-4073-bdb8-23fb925284db@l32g2000hse.googlegroups.com...
Quote: Suppose the Jet's quarterback has a 60% probability of completing 20
or more passes in a Football game, and a 40% probability of completing
less than 20 passes. With 20 or more completions, the Jets have an 80%
probability of winning the game. But, with less than 20 completions,
the probability of winning falls to 40%. If the Jets win the next
game, what is the probability that the quarterback completed more that
20 passes? |
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| Phil Holman |
| Posted: Thu Feb 07, 2008 7:38 pm |
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"rdavtyan" <rdavtyan@hotmail.com> wrote in message
news:9334ebad-6b45-4073-bdb8-23fb925284db@l32g2000hse.googlegroups.com...
Quote: Suppose the Jet's quarterback has a 60% probability of completing 20
or more passes in a Football game, and a 40% probability of completing
less than 20 passes. With 20 or more completions, the Jets have an 80%
probability of winning the game. But, with less than 20 completions,
the probability of winning falls to 40%. If the Jets win the next
game, what is the probability that the quarterback completed more that
20 passes?
20 or more
Y N Total
Y 48 16 64
Win N 12 24 36
Total 60 40 100
48/64 = .75
Phil H |
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