Can someone help me with this question.

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- May 19th 2009, 10:45 PMFreemymindProbability density function
Can someone help me with this question.

http://i49.photobucket.com/albums/f2.../Probdense.jpg - May 19th 2009, 10:55 PMmr fantastic
- May 19th 2009, 11:02 PMmatheagle
In case you're interested this is an exponential random variable, which is a subset of the gamma family.

Also the parameter a needs to be positive, it does have to be in the interval (0,1).

You can check your answer at http://en.wikipedia.org/wiki/Exponential_distribution - May 20th 2009, 09:48 AMFreemymind
For a I got

-e^(-a(b))- (-e^(a(0)) b = infiniti

But that does not give me 1 - May 20th 2009, 01:35 PMmatheagle