Results 1 to 2 of 2

Math Help - Normal Model

  1. #1
    Member
    Joined
    Jan 2008
    Posts
    118

    Normal Model

    A student tossed her coin 200 times, and found only 42% heads.

    I know this is kinda low, but possible.

    Can someone work all of this out and show me how to put it into a normal model with the SD and mean? Please explain? thanks
    Follow Math Help Forum on Facebook and Google+

  2. #2
    Super Member
    Joined
    Oct 2007
    From
    London / Cambridge
    Posts
    591
    Are you doing hypothesis testing ? Are you familiar with the binomial distribution ?

    some pointers.

    Let X be the variable that represents the number of heads. We have X \sim B(200, 0.5)

    Because you're using a large amount of trails you can use the Normal approximation X \simeq \  \sim N (100 , 50)


    Bobak
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Replies: 1
    Last Post: May 6th 2010, 03:06 AM
  2. Replies: 3
    Last Post: April 15th 2009, 02:18 AM
  3. Probability using the Normal Model
    Posted in the Advanced Statistics Forum
    Replies: 1
    Last Post: November 12th 2008, 10:52 AM
  4. Replies: 1
    Last Post: April 20th 2008, 07:35 PM
  5. Normal Model...stats
    Posted in the Advanced Statistics Forum
    Replies: 1
    Last Post: March 26th 2008, 04:51 AM

Search Tags


/mathhelpforum @mathhelpforum