I want to find the distribution of the question.
A student uses a computer for an average of 10 minutes. Let X denote the amount of time that a student uses the computer in a single session.
Confusing me with distribution and parameter.
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It is not clear what a suitable model might be. – André Nicolas Mar 25 '16 at 04:28
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Exponential is OK, since there is no upper bound on time spent on PC by one student. Now exponential distribution has one parameter $\lambda$ and its expected value is $\lambda^{-1}$ can you know count the parameter $\lambda$?
iiivooo
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Yeah I was thinking exponential too, using λ = 1/10. But the definition of exponential confused me as in time until the first success does not seem to fit this problem very well. is λ=1/10 correct? – Cheesy Williams Mar 25 '16 at 03:17
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You can think that success = "leaving the computer". Your $\lambda$ is correct. – iiivooo Mar 25 '16 at 03:20
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oh ok. Thank you! the wording just confused me for a bit there. – Cheesy Williams Mar 25 '16 at 03:21
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You're welcome. Please consider accepting the answer = closing the question to let others know that you've got your answer. – iiivooo Mar 25 '16 at 03:30