# Math Help - Inverse Gaussian (Wald) distribuiton

1. ## Inverse Gaussian (Wald) distribuiton

Hi all,
I am having trouble to prove that the inverse Gaussian is a valid pdf.
Thanks for your help.

2. ## Re: Inverse Gaussian (Wald) distribuiton

Hello,

What have you tried ? Have you found the pdf of the inverse Gaussian ?

3. ## Re: Inverse Gaussian (Wald) distribuiton

Originally Posted by Moo
Hello,

What have you tried ? Have you found the pdf of the inverse Gaussian ?
I tried the pdf; but it didn't get me anywhere! I couldn't show that the integral was equal to 1.

Thanks!

4. ## Re: Inverse Gaussian (Wald) distribuiton

Then please show what you got. And detail your calculation steps as much as possible. It's easier to spot a mistake than explaining the whole thing. Especially when a few methods are possible.