My Math Forum Probability (Poisson)

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 December 16th, 2009, 04:06 PM #1 Member   Joined: Nov 2009 Posts: 38 Thanks: 0 Probability (Poisson) A machine on average produces 4 defective items out of a batch of 100 items. Find the probability that a batch of 50 items has 3 defective items in it using the Poisson probability distribution. the problem is.. i just want to know the mean or average value for batch of 50 items.. i got mean = 2 because for 100 items, the mean is 4.. ............for 50 items, the mean would be 2.. correct?
 December 17th, 2009, 01:14 PM #2 Global Moderator   Joined: May 2007 Posts: 6,835 Thanks: 733 Re: Probability (Poisson) yes.

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