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# Exponential prob distribution watch

1. Can you please explain why I should not put a positive infinity upper boundary (10^99) when finding the exponential prob. distribution? Since doing so will give me 0 as the probability. And what is the ideal value of upper boundary to put? Thanks in advance!
2. (Original post by Samsoonie)
Can you please explain why I should not put a positive infinity upper boundary (10^99) when finding the exponential prob. distribution? Since doing so will give me 0 as the probability. And what is the ideal value of upper boundary to put? Thanks in advance!
Is there a particular question that you are trying to answer? If so would you like to post it?
3. Can you please refer to note 1 below the worked example? Thanks!

4. Well I think they're just saying that if you use a big enough value then you're going to get 0 - - e^-3 = 0.0498 because e^-(big enough number) is practically zero. I don't see why you have to put a number in a calculator to see this though.

In any case you could just do 1-the integral from 0 to 10.

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Updated: May 19, 2010
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