Recent content by Spunkerspawn

Figured it out. Thanks RGV.

Would this be the product of the poisson distributions of each problem type?

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 can get closer to a solution via your suggestion. Thanks a lot!

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 : )

Hey guys, first of all I want to say hey to all! I have been a long time lurker and follower of these forums and have been known to find a lot of your answers helping me out throughout my college life. I also know that you just don't like to spit out the answers for those who don't put in...