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March 4th, 2013, 04:11 PM   #1
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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.
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March 4th, 2013, 05:47 PM   #2
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Re: PDF - probability density functions

R = 1. Mean time = 11. You are right.
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March 4th, 2013, 07:48 PM   #3
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Re: PDF - probability density functions

There must be an error in the online marking system.
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