# Thread: chi square dist with zero degrees of freedom

1. ## chi square dist with zero degrees of freedom

give a reasonable definition of a chi square dist with zero degrees of freedom.
(work with mgf of a dist that is chi square and let r=0)

I was thinking this is gamma dist with alpha=0,beta=2 but can we have gamma dist with a=0???

2. Originally Posted by ninano1205
give a reasonable definition of a chi square dist with zero degrees of freedom.
(work with mgf of a dist that is chi square and let r=0)

I was thinking this is gamma dist with alpha=0,beta=2 but can we have gamma dist with a=0???
Look at these:

Noncentral chi-square distribution - Wikipedia, the free encyclopedia