
Advanced Statistics Advanced Probability and Statistics Math Forum 
 LinkBack  Thread Tools  Display Modes 
June 15th, 2017, 03:36 PM  #1 
Member Joined: Apr 2017 From: PA Posts: 45 Thanks: 0  Let X be a random variable with range [−1,1] and let fX(x) be the density function of
Let X be a random variable with range [−1,1] and let fX(x) be the density function of X. Find µ(X) and σ^2(X) if, for x < 1 (a) fX(x) = x 
June 15th, 2017, 06:02 PM  #2 
Global Moderator Joined: May 2007 Posts: 6,628 Thanks: 622 
Basic definitions: density function f(x) moments: $\displaystyle m_n=\int x^nf(x)dx$ mean= $\displaystyle m_1$ variance $\displaystyle \sigma ^2=m_2m_1^2$ 

Tags 
−1, density, function, fxx, random, range, theory of probability, variable 
Thread Tools  
Display Modes  

Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
function of random variable  mhhojati  Advanced Statistics  3  October 20th, 2015 06:46 PM 
Density of a random variable  alfred_oh  Advanced Statistics  0  April 30th, 2013 06:53 AM 
Probability density function of this variable  lui14  Probability and Statistics  0  February 2nd, 2013 03:56 AM 
distribution of a function of a random variable problem  frankpupu  Advanced Statistics  2  March 1st, 2012 04:45 AM 
function of random variable  benjaminmar8  Advanced Statistics  1  April 10th, 2008 08:14 AM 