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S2 problem question

https://gyazo.com/8eff49d405451fbb69b394cdb84ab407

Everything in this question is completely fine apart from part (e), in which I am stumped as to what to do?

Many thanks!
Reply 1
Avatar for Zacken
Zacken
22
Original post by iMacJack
https://gyazo.com/8eff49d405451fbb69b394cdb84ab407

Everything in this question is completely fine apart from part (e), in which I am stumped as to what to do?

Many thanks!


I don't see what's confusing.

You want P(T < 4) * P(X=0) where X ~ Po(1.2).
Reply 2
Avatar for iMacJack
iMacJack
OP
16
Original post by Zacken
I don't see what's confusing.

You want P(T < 4) * P(X=0) where X ~ Po(1.2).


Ah - I see... thank you!
Reply 3
Avatar for Zacken
Zacken
22
No problem.
Original post by Zacken
No problem.


Sometimes the phrasing of questions can include irrelevant information, obscuring what is actually a fairly simple question (here the test is that you know about the additive feature of the Possion distribution). Watch out for this in S2 :smile:
Reply 5
Avatar for Zacken
Zacken
22
Original post by BrasenoseAdm
Sometimes the phrasing of questions can include irrelevant information, obscuring what is actually a fairly simple question (here the test is that you know about the additive feature of the Possion distribution). Watch out for this in S2 :smile:


Think you've quoted the wrong person. :smile:
Reply 6
Avatar for iMacJack
iMacJack
OP
16
Original post by Zacken
I don't see what's confusing.

You want P(T < 4) * P(X=0) where X ~ Po(1.2).


To rebump this (apologies) why is it not <= 4?
Reply 7
Avatar for Zacken
Zacken
22
Original post by iMacJack
To rebump this (apologies) why is it not <= 4?


Eh? You should know that for a continuous random variable P(T < 4) = P(T <= 4).

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