Thread: probability distribution ...

Hello,
I face some problem in this question plz try to solve that.
Thanks .

Question:
Suppose is a random variable best described by a probability distribution given as:f(x)1/25 , 20 less than equal x less than equal 45.

Find the Expected value of X.

Originally Posted by m777

Hello,
I face some problem in this question plz try to solve that.
Thanks .

Question:
Suppose is a random variable best described by a probability distribution given as:f(x)1/25 , 20 less than equal x less than equal 45.

Find the Expected value of X.

Please try to type the question more carefully.

I will answer this question:

"Suppose X is a random variable best described by a probability distribution given as:

f(x) = 1/25 , 20 <= x <= 45.
f(x) = 0 otherwise"

Then has a uniform distribution on , or . Now we
can calculate the mean as:



or we can use the fact that we know that the mean is the midpoint of the
interval or:

RonL