Help with probability density function

louise113

New member
Joined
Feb 4, 2017
Messages
3
Hello,


I am struggling with the following question -does anyone have any ideas on how to approach it?


Y has the probability density function defined by: f(y) = kθ^k / y^k+1, y >= θ


and f(y) = 0 for y< θ, where θ>0 and k>0


Question: Why is k restricted to being greater than 2 in the definition of the pdf?


Thanks :)
 

tkhunny

Moderator
Staff member
Joined
Apr 12, 2005
Messages
10,030
Have you considered testing for a valid probability density? Maybe an integral to see that it adds up to Unity? You may find restrictions along the way.
 
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