probability problem....  TOPIC_SOLVED

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probability problem....

Postby marty.frmn on Sat Oct 10, 2009 6:20 pm

The probability that a person takes 1 step to the left is 1/3 and the probability that the person takes 1 step to the right is 1/4.... what is the probability that the person ends up 1 step to the right after taking 23 such steps....????
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Re: probability problem....

Postby marty.frmn on Sun Oct 11, 2009 8:26 pm

could please somebody provide a hint to this problem please..... i need to solve this.... i can't understand where to begin with this question....
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Re: probability problem....  TOPIC_SOLVED

Postby jabuec4367 on Sat Oct 24, 2009 2:32 am

I am a newbie to statistics and am in my 2nd week BUS308 Statistics class (online). I would like to assume I know the anwer to this problem by directing you to hypergeometric probability example to solve this problem. I used a simulator to arrive at 17% chance the 23rd step would be to the right and 82% chance the 23rd step would be to the left. Although it was uncalled for, I set up a sample space using only 7 steps (1 in 3 for Right, 1 in 4 for Left) and calculated the standard deviation as 0.170239 which is strangely enough the probability that the hypergeometric probability simulator arrived at for the outcome.
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