Results 1 to 7 of 7

Math Help - Using the Normal Distribution

  1. #1
    Member
    Joined
    Nov 2008
    Posts
    92

    Using the Normal Distribution

    Hi,

    Using the normal distribution table, how do you find that probability than z equals a constant? For example, P(z = 1.5).

    I know how to find the probalility within a range (e.g. 0.5 < z < 1).

    Thanks
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Joined
    Dec 2009
    Posts
    3,120
    Thanks
    1
    you can't!

    How would you calculate the probability of a student being an exact height
    or an exact age to the nearest second?
    Follow Math Help Forum on Facebook and Google+

  3. #3
    Flow Master
    mr fantastic's Avatar
    Joined
    Dec 2007
    From
    Zeitgeist
    Posts
    16,948
    Thanks
    5
    Quote Originally Posted by algorithm View Post
    Hi,

    Using the normal distribution table, how do you find that probability than z equals a constant? For example, P(z = 1.5).

    I know how to find the probalility within a range (e.g. 0.5 < z < 1).

    Thanks
    If X is a continuous random variable then you should have been taught that Pr(X = a) = 0.
    Follow Math Help Forum on Facebook and Google+

  4. #4
    Member
    Joined
    Nov 2008
    Posts
    92
    Hi,

    Maybe it is an error in the book? Q24c is similar.

    Regards
    Follow Math Help Forum on Facebook and Google+

  5. #5
    Super Member
    Joined
    Jul 2009
    Posts
    593
    Thanks
    4
    What is the answer in the book? I doubt that they would get a basic question incorrect. Are you asking the question right is the query I have.
    Follow Math Help Forum on Facebook and Google+

  6. #6
    Member
    Joined
    Nov 2008
    Posts
    92
    Hi,

    I ask the question in: http://www.mathhelpforum.com/math-he...tribution.html

    Regards
    Follow Math Help Forum on Facebook and Google+

  7. #7
    MHF Contributor
    Joined
    Dec 2009
    Posts
    3,120
    Thanks
    1
    You would get an exact probability in the Binomial and others.
    Sometimes the Binomial is approximated to the Normal.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. [SOLVED] Mixing a uniform distribution with a normal distribution
    Posted in the Advanced Statistics Forum
    Replies: 4
    Last Post: July 8th 2011, 08:27 AM
  2. normal distribution prior and posterior distribution proof
    Posted in the Advanced Statistics Forum
    Replies: 0
    Last Post: March 9th 2011, 06:12 PM
  3. Replies: 2
    Last Post: March 29th 2010, 02:05 PM
  4. Replies: 3
    Last Post: February 6th 2009, 03:59 AM
  5. Replies: 1
    Last Post: April 20th 2008, 06:35 PM

Search Tags


/mathhelpforum @mathhelpforum