Results 1 to 2 of 2

Math Help - when is the empricial rule true?

  1. #1
    Senior Member
    Joined
    Jun 2009
    Posts
    251

    when is the empricial rule true?[RESOLVED]

    Does the empirical rule (aka 68-95-99.7 rule) only apply to normal distribution or is it true for skewed data as well?

    My guess is yes, because the standard deviation is differnt between normally distributed data and skewed data.
    Last edited by superdude; June 22nd 2010 at 12:18 PM. Reason: resolved
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Grand Panjandrum
    Joined
    Nov 2005
    From
    someplace
    Posts
    14,972
    Thanks
    4
    Quote Originally Posted by superdude View Post
    Does the empirical rule (aka 68-95-99.7 rule) only apply to normal distribution or is it true for skewed data as well?

    My guess is yes, because the standard deviation is differnt between normally distributed data and skewed data.
    These are the probabilities of being within 1, 2 and 3 SD's of the mean for a normally distributed random variable. They do not apply in general.

    CB
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 7
    Last Post: October 5th 2011, 01:45 PM
  2. Replies: 1
    Last Post: October 4th 2011, 03:19 AM
  3. Replies: 0
    Last Post: October 22nd 2010, 12:19 PM
  4. True or False. Prove if true show counter example if false.
    Posted in the Differential Geometry Forum
    Replies: 0
    Last Post: March 2nd 2010, 11:54 AM
  5. L'Hospital's Rule True/False
    Posted in the Calculus Forum
    Replies: 5
    Last Post: November 23rd 2008, 01:47 PM

Search Tags


/mathhelpforum @mathhelpforum