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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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