Find a formula for p(x) = P(X=x) ....


by sbarb25
Tags: formula
sbarb25
sbarb25 is offline
#1
Oct20-09, 12:05 AM
P: 2
So I have a test tomorrow and this question is in a list of review questions and I'm having trouble remembering where the mu fits into the formula. Any help would be greatly appreciated :)

Question: Suppose that X is a random variable with just two possible values a and b. For x = a and b find a formula for p(x) = P(X = x) in terms of a, b and mu = E(X).
Phys.Org News Partner Science news on Phys.org
Cougars' diverse diet helped them survive the Pleistocene mass extinction
Cyber risks can cause disruption on scale of 2008 crisis, study says
Mantis shrimp stronger than airplanes
Office_Shredder
Office_Shredder is offline
#2
Oct20-09, 01:02 AM
Mentor
P: 4,499
If P(X=a)=p and P(X=b)=1-p, what can you say about E(X)?


Register to reply

Related Discussions
Can't find formula of a serie. Calculus & Beyond Homework 4
How To Find The Formula of This Permutations? General Math 1
Re-arranging a formula to find Vm Introductory Physics Homework 2
hi what formula do i use to find for my question Introductory Physics Homework 21
Help me find the recursive formula General Math 10