I'm having a bit of trouble with d.(ii)
For d.(i) the distribution for waiting time for Problem of Type 1 is exponential with a mean of 30/0.75.
How do I proceed with d.(ii)?
I completely understand what you mean for (c) as in just one problem might be before 120 days but the remaining 3 could happen after 120 days. But I believe, in this case, it is just asking for the exact fourth problem to happen after 120 days.
Actually I am ok with (e), correct me if I am wrong but we should be dealing with the "memorylessness" property of the exponential distribution right?
For (a) I said distribution Erlang since we are dealing with a sum of exponential distributions: the cdf of an erlang is: 1 - exp^-(mean.x) *...
Homework Statement
The time between process problems in a manufacturing line is exponentially distributed with a mean of 30 days.
(a) Let T be the waiting time (in days) for four problems. What is the distribution of T?
(b) What is the expected waiting time for four problems?
(c)...
I think I should have posted this to the homework section, it reads much more like a textbook style question. So if one of the mods can move this question, or if anyone would still like to help out that would be appreciated : )
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