1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Poisson distribution

  1. Oct 23, 2004 #1
    Hello In my text the following question is posed:

    ON a city street, car backfires are heard 8 times per hour. Use the poisson distribution to find an exact expression for the prob. that a car backfire is heard at most once in a given hour. Do not simplify or evaluate your answer.

    Now from my understanding, in the poisson distribution, mean = variance = 'parameter'

    In the question we can assume that the mean equals 8, thus letting the parameter = 8.

    A car backfire is heard at most once in a given hour.
    = Probability of hearing 0 backfires + probability of hearing 1 backfire

    = 8^0 e^(-8) / 0! + 8^1 e^(-8) / 1!
    = e^(-8) + 8e^(-8)
    = 9e^(-8)

    Is this the correct solution? Thanks for your time
  2. jcsd
  3. Oct 23, 2004 #2

    -- AI
  4. Oct 23, 2004 #3
    Thanks very much
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Poisson distribution
  1. Poisson Distribution (Replies: 4)

  2. Poisson distribution (Replies: 1)

  3. Poisson Distribution (Replies: 1)

  4. Poisson distribution (Replies: 2)