Results 1 to 2 of 2

Math Help - Expected Value of Normal Distribution

  1. #1
    Newbie
    Joined
    Apr 2008
    Posts
    1

    Expected Value of Normal Distribution

    Please help with the following:
    Just as the difference between 2 sample means is normally distributed for large samples, so is the difference between 2 sample proportions, that is , if Y1 and Y2 are independent binomial variables with parameters (n1, p2) and (n2,p2) respectively, then (Y1/n1) (Y2/n2) is approximately normally distributed for large quantities of n1 and n2
    • Find E(Y1/n1 Y2/n2)
    • Find V(Y1/n1 Y2/n2)
    Thanks in advance
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Flow Master
    mr fantastic's Avatar
    Joined
    Dec 2007
    From
    Zeitgeist
    Posts
    16,948
    Thanks
    5
    Quote Originally Posted by lolu View Post
    Please help with the following:
    Just as the difference between 2 sample means is normally distributed for large samples, so is the difference between 2 sample proportions, that is , if Y1 and Y2 are independent binomial variables with parameters (n1, p2) and (n2,p2) respectively, then (Y1/n1) (Y2/n2) is approximately normally distributed for large quantities of n1 and n2
    • Find E(Y1/n1 Y2/n2)
    • Find V(Y1/n1 Y2/n2)
    Thanks in advance
    Read through this: Mean and Variance of Random Variables

    (About halfway down and at the end are formulae relevant to your question).
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. evaluate expected value (normal distribution)
    Posted in the Advanced Statistics Forum
    Replies: 4
    Last Post: July 19th 2010, 01:48 AM
  2. Standard normal distribution expected values
    Posted in the Advanced Statistics Forum
    Replies: 1
    Last Post: March 14th 2010, 10:14 PM
  3. Expected value of squared normal
    Posted in the Advanced Statistics Forum
    Replies: 2
    Last Post: January 25th 2010, 04:03 PM
  4. Normal Distribution Expected Value
    Posted in the Advanced Statistics Forum
    Replies: 4
    Last Post: December 3rd 2009, 07:18 PM
  5. expected value of a segment of normal distribution
    Posted in the Advanced Statistics Forum
    Replies: 1
    Last Post: April 19th 2007, 12:00 PM

Search Tags


/mathhelpforum @mathhelpforum