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I Basic Poisson Statistic

  1. Apr 2, 2017 #1
    Hello! I came across this problem: A counter near a long-lived radioactive source measures an average of 100 counts per minute. What is the probability that more than 110 counts will be recorded in a given one-minute interval? I am not sure how to do it. Applying the Poisson distribution formula involves very big numbers.
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  3. Apr 2, 2017 #2


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    Hint: 100 is a fairly large number.
  4. Apr 2, 2017 #3
    I am not sure how to use that...
  5. Apr 4, 2017 #4


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    Central limit theorem comes to mind. Also being aware that the mean and variance are equal in a Poisson is useful too.
  6. Apr 9, 2017 #5


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