Course 4 question HELP!

[pirates]

An astronomer monitors the length of time a solar flare is visible during a 10 hour period. The following table indicates the time during the 10 hour period that a solar flare began, and the length of that flare. Only flares that started and ended before the 10 hour period was over are recorded.

Start time of Flare Ti Length of flare Xi

1 2
5 3
4 4
5 4
3 5
4 5
2 6

Given that the flare lasts no more than 10 hours, using the appropriate form of the Product limit estimator, estimate the probability that the flare lasts less than 5 hours.

Can someone please solve this for me using the ASM method for right truncation. This problem is number 36 in practice exam 1 in the Actex manual and I can't get any of the answer choices.

could someone please help?

thanks!!!!

[mzbhavn]

What are the answer choices?

[Snoopy01]

Tell us what the answer is and we will come up with a way to get that answer :)

I got .5333 doing it the ASM way.

Edit1: Actually it could be 1-.53333

Edit 2: No, I should stick with my first answer

[dfeucht]

I am not sure what method ASM uses, but by my calculation the solution is

(4/5)*(4/6) = 16/30 which I believe is .5333333 (no calculator in front of me)

[M.]

I asked about this question a week ago. We got the same answer: 8/15. We discussed this in the thread "Actex, Practice Exam 1, #36."

phdmom found several other mistakes on the first Actex Practice Exam. It's horrible. The remaining exams, according to her, don't have very many mistakes.

The second exam is pretty tough. Exams 3 and 4 were reasonably simple, perhaps too simple. I haven't done Exam 5.

Good luck!