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March 4th, 2013, 04:11 PM  #1 
Newbie Joined: Feb 2013 Posts: 16 Thanks: 0  PDF  probability density functions
The probability that a cell drawn at random from a large population has divided at time greater or equal to 10 (minutes) is where is some constant. (We assume that cells never divide before time t=10 min.) (a) find the mean time for division In pdfs, the area of the probability is equal to one. The mean is equal to the After integrating by parts I get the mean time being 11. This is however not the right answer. I found R to be 1, as it is the normalization constant found by finding the area of and solving for R. 
March 4th, 2013, 05:47 PM  #2 
Senior Member Joined: Feb 2013 Posts: 281 Thanks: 0  Re: PDF  probability density functions
R = 1. Mean time = 11. You are right.

March 4th, 2013, 07:48 PM  #3 
Newbie Joined: Feb 2013 Posts: 16 Thanks: 0  Re: PDF  probability density functions
There must be an error in the online marking system.


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density, functions, pdf, probability 
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