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Homework Help: Exponential distribution.

  1. Jul 2, 2013 #1
    1. The problem statement, all variables and given/known data
    If the life expectancy of a light bulb is a random exponential variable and equal (on average) to 100 hrs, is λ then equal to 0.01 or to 100? (λ = 1/expectation)
  2. jcsd
  3. Jul 2, 2013 #2


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    Hi,peripatein, you're supposed to show us your work. What have you done/tried so far?
  4. Jul 2, 2013 #3
    There is no work involved. I wasn't asking for help to solve anything; this merely regards an uncertainty I have concerning λ. I am simply not sure whether it should be 1/100 or 100, given the above details. I am not really sure what work you are asking me to show.
  5. Jul 2, 2013 #4


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    You seem to have answered your own question: expectation = 100hrs, λ = 1/expectation.
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