Register to reply

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

by sbarb25
Tags: formula
Share this thread:
sbarb25
#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
'Smart material' chin strap harvests energy from chewing
King Richard III died painfully on battlefield
Capturing ancient Maya sites from both a rat's and a 'bat's eye view'
Office_Shredder
#2
Oct20-09, 01:02 AM
Emeritus
Sci Advisor
PF Gold
P: 4,500
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