Results 1 to 2 of 2

Math Help - Probability Mass Function

  1. #1
    Junior Member
    Joined
    Mar 2009
    Posts
    69

    Question Probability Mass Function

    There are 89 students in your probability class. What is the probability that exactly one other student has the same birthday as you? (For simplicity, exclude birthdays on February 29.) Calculate this exactly using the binomial PMF and also approximately by using the Poisson PMF.

    1. Exact answer:
    2. Poisson approximation:
    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 essedra View Post
    There are 89 students in your probability class. What is the probability that exactly one other student has the same birthday as you? (For simplicity, exclude birthdays on February 29.) Calculate this exactly using the binomial PMF and also approximately by using the Poisson PMF.

    1. Exact answer:
    2. Poisson approximation:
    Here is your starting point:

    Let X be the number of students having your birthday.

    X ~ Binomial(n = 89, p = 1/365).
    Follow Math Help Forum on Facebook and Google+

Similar Math Help Forum Discussions

  1. Probability Mass Function
    Posted in the Statistics Forum
    Replies: 3
    Last Post: October 6th 2011, 06:40 PM
  2. Probability mass function
    Posted in the Advanced Statistics Forum
    Replies: 1
    Last Post: January 31st 2010, 07:37 PM
  3. Replies: 3
    Last Post: December 15th 2009, 06:30 AM
  4. Probability Mass Function?
    Posted in the Advanced Statistics Forum
    Replies: 1
    Last Post: October 6th 2009, 03:16 AM
  5. probability mass function
    Posted in the Advanced Statistics Forum
    Replies: 1
    Last Post: January 22nd 2009, 01:06 AM

Search Tags


/mathhelpforum @mathhelpforum