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November 25th, 2011, 08:16 PM  #1 
Senior Member Joined: Nov 2009 Posts: 169 Thanks: 0  find the expected number
Assume that Y denotes the number of bacteria per cubic centimetre in a particular liquid and that Y has a Poisson distribution with parameter . Further assume that varies from location to location according to a gamma distribution with parameters and , where is a positive integer. If we randomly select a location, what is the (A) expected number of bacteria per cubic centimetre? (B) standard deviation of the number of bacteria per cubic centimetre? 

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