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Probability
Message posted by Claire Harris on October 16, 1999 at 12:00 AM (ET)
How do you find out the Binomial Distribution (At 'A Level' Understanding) when you have
X~Bin(n,0.1)
and you have to find n?
READERS RESPOND:
(In chronological order. Most recent at the bottom.)
Re: Probability
Message posted by JG on October 17, 1999 at 12:00 AM (ET)
A binomial distribution is determined by n and 'P'. That is you toss a coin n times with a probability of heads 'p' , and you count the number of heads. If you are given a probability and 'p' you can work backwords to calculate n. Or if you have two probabilities you can calculate both n and p .
Re: Probability
Message posted by JG on October 17, 1999 at 12:00 AM (ET)
I think that you have been given an X for a given alpha value and you are being asked to calculate n. Your p seems to be .1 . If I am right this is a somewhat difficult problem that can only be solved by an appropriate use of binomial tables that can be found at the back of most statistics books.
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