My Math Forum  

Go Back   My Math Forum > College Math Forum > Advanced Statistics

Advanced Statistics Advanced Probability and Statistics Math Forum

LinkBack Thread Tools Display Modes
April 7th, 2017, 11:03 AM   #1
Joined: Nov 2013

Posts: 29
Thanks: 1

Mgf of an exponential distribution

I need to mgf of the exponential distribution for another problem. In my text it says the mgf of a gamma is
and since the exponential is a special case of gamma with a=1 and b=θ, I figured that the mgf of an exponential would be
However on wikipedia, it says
I can't see how these two equations are the same thing and for them to both be the mgf they'd have to be because of the uniqueness of the mgf. I believe wikipedia but I'm confused about why my method of finding the mgf doesn't work. Could someone make sense of this?
Gamegeck is offline  
April 7th, 2017, 04:49 PM   #2
Global Moderator
Joined: May 2007

Posts: 6,454
Thanks: 567

Special case? b=1/θ???
mathman is online now  

  My Math Forum > College Math Forum > Advanced Statistics

distribution, exponential, mgf

Thread Tools
Display Modes

Similar Threads
Thread Thread Starter Forum Replies Last Post
Exponential Distribution WWRtelescoping Probability and Statistics 1 April 26th, 2016 06:44 PM
Negative exponential distribution to the poisson distribution alan02011114 Advanced Statistics 0 April 21st, 2015 10:03 AM
Help in Exponential Distribution jovic1104 Advanced Statistics 1 July 18th, 2010 01:39 AM
Exponential distribution backtoreality15 Advanced Statistics 1 May 8th, 2009 07:17 AM

Copyright © 2018 My Math Forum. All rights reserved.