Recent content by clockworks

  1. C

    Finding the Expected Value of X with a Probability Density Function

    thx vela problem solved :D
  2. C

    Finding the Expected Value of X with a Probability Density Function

    using wikipedia i found the correct answer (using the formulas that use the variance and such) but id still like to know how to recalculate it using the identities given so my question still stands :D
  3. C

    Finding the Expected Value of X with a Probability Density Function

    also the probability density function is a Rayleigh distribution
  4. C

    Finding the Expected Value of X with a Probability Density Function

    im sorry the domain of fx is the function provided for x>=a and 0 otherwise
  5. C

    Finding the Expected Value of X with a Probability Density Function

    Homework Statement f(x)=&(x-a)exp((-(x-a)^2)/b) where a and b are constants Homework Equations find & in terms of b: show that the expected value of X is given by X=a + sqrt(pi*b/4) identity given x(x-a)=(x-a)^2+a(x-a) and integral from 0 to infinity of x^2*exp-x^2 dx=sqrt...