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#1 2009-09-01 04:31:47

Identity
Member
Registered: 2007-04-18
Posts: 934

changing variables in a pdf

There is the pdf

and

. You need to find
.

I used two methods but they come up with difference results:

1.

The cdf

So

Note that I used the formula

2.

Using the formula

Last edited by Identity (2009-09-01 18:46:47)

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#2 2009-09-01 04:51:57

juriguen
Member
Registered: 2009-07-05
Posts: 59

Re: changing variables in a pdf

Hi!


You have to differentiate in order to obtain the pdf out of the cdf!


I think then they results match!


Jose


“Make everything as simple as possible, but not simpler.” -- Albert Einstein

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#3 2009-09-01 18:44:08

Identity
Member
Registered: 2007-04-18
Posts: 934

Re: changing variables in a pdf

Thanks juiguen, I just realised I got the formula for integration wrong:

Last edited by Identity (2009-09-01 19:10:05)

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#4 2009-09-01 19:15:32

juriguen
Member
Registered: 2009-07-05
Posts: 59

Re: changing variables in a pdf

Sure!

I actually hadn't realized how you had used that formula, and not I see it, so go for both smile

Jose


“Make everything as simple as possible, but not simpler.” -- Albert Einstein

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