Math Is Fun Forum

pavino14

Member

Registered: 2017-07-09

Posts: 3

MCQ on Probability density function ??

The probability density function of a discrete random variable X is given by P(X=x)=a(1/2)^x  ..... Then what is the value of a is..?????

Bob

Administrator

Registered: 2010-06-20

Posts: 10,640

Re: MCQ on Probability density function ??

hi pavino14

Welcome to the forum.

The area under a pdf has to be 1 in total so you need to work out 'a' when

Are you able to do the integral?

Bob

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Children are not defined by school ...........The Fonz
You cannot teach a man anything;  you can only help him find it within himself..........Galileo Galilei
Sometimes I deliberately make mistakes, just to test you!  …………….Bob

pavino14

Member

Registered: 2017-07-09

Posts: 3

Re: MCQ on Probability density function ??

I'm just learning integral...Thank you admin ..

Last edited by pavino14 (2017-07-16 03:06:04)