Results 1 to 2 of 2

Math Help - Help with Poisson Distribution

  1. #1
    Newbie
    Joined
    Jun 2014
    From
    frer
    Posts
    1

    Help with Poisson Distribution

    Hi guys I got a question on the poisson distribution and never previously done stats at all.


    It follows:


    The mean count of a radioactive substance is 25 disintegrations per minute. Using the Poisson distribution, find the probability that, in a time of 12 seconds, there are-


    i) No disintegrations


    ii) More than 2 disintegrations
    Follow Math Help Forum on Facebook and Google+

  2. #2
    MHF Contributor
    Joined
    Nov 2013
    From
    California
    Posts
    2,462
    Thanks
    950

    Re: Help with Poisson Distribution

    Quote Originally Posted by mathsforumuser View Post
    Hi guys I got a question on the poisson distribution and never previously done stats at all.

    It follows:

    The mean count of a radioactive substance is 25 disintegrations per minute. Using the Poisson distribution, find the probability that, in a time of 12 seconds, there are-

    i) No disintegrations
    ii) More than 2 disintegrations
    If you've never done stats, why do you have to answer this question?

    As the mean count is 25 dpm this specifies the distribution parameter $\lambda=25$

    i) is just the Cumulative distribution function (CDF) of the specified Poisson distribution evaluated at 0.

    ii) is 1 - CDF(2)

    you can find the CDF on wiki or by integrating the PDF of the Poisson distribution.
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Binomial distribution va. Poisson distribution
    Posted in the Statistics Forum
    Replies: 2
    Last Post: November 9th 2012, 05:41 AM
  2. Replies: 1
    Last Post: December 27th 2011, 01:08 PM
  3. Poisson Distribution
    Posted in the Statistics Forum
    Replies: 3
    Last Post: October 7th 2010, 01:12 PM
  4. Poisson distribution and asymptotic normal distribution.
    Posted in the Advanced Statistics Forum
    Replies: 0
    Last Post: August 18th 2010, 05:52 AM
  5. poisson distribution
    Posted in the Statistics Forum
    Replies: 1
    Last Post: November 24th 2008, 02:19 AM

Search Tags


/mathhelpforum @mathhelpforum