how do i do aii and b?
#normal distribution b & c
pearl furnace
austere flame
how do i do aii and b?
aii) p(x>=15) = p
1-p=q
conside pp+pq+qp
for b im not too sure sorry
pearl furnace
i need help on c as well 😭 i did the part i circled, i dont get how to get the values
pearl furnace
aii) p(x>=15) = p
1-p=q
conside pp+pq+qp
wdym?
austere flame
wdym?
for them to revcieve a compensation the delay must exceed 15 mins so x>15 for at least one of the journeys
they do 2 trips so both can be delayed more than 15 or only 1
pearl furnace
they do 2 trips so both can be delayed more than 15 or only 1
it says it has 2 delayed trains
i tried squaring part a but the ms did sm other stuff
idk what they ddi
austere flame
it says it has 2 delayed trains
yh thats why i said 2 trips
as in 2 trips on a train
pearl furnace
pearl furnace
as in 2 trips on a train
yeah
but idk how to only get 1 refund from that 😭
surely if train is delayed twice you should get 2 refunds
austere flame
surely if train is delayed twice you should get 2 refunds
it says at least 1 refund
that means they could get 1 or 2
pearl furnace
so how would you work it out?
austere flame
so how would you work it out?
either 1 - p(x<15)^2
austere flame
aii) p(x>=15) = p
1-p=q
conside pp+pq+qp
or do this #
cause that comse from refund refund or refund no refund or no feund refund
pearl furnace
ohh i kinda get it
pearl furnace
cause that comse from refund refund or refund no refund or no feund refund
wait what does the 1-p represent?
austere flame
wait what does the 1-p represent?
1-p = q = p(x<15)
pearl furnace
ohh so no refund
empty sand
smb help with b & c 🥲
c is basically a fancy hypothesis test
pearl furnace
normal distribution b & c
empty sand
you set it up normally
pearl furnace
i dont get how to find the values
pearl furnace
i need help on c as well 😭 i did the part i circled, i dont get how to get the...
i did the things i circled
i dont know how to do the last 2 steps
empty sand
find a value for c that will be the closest to 0.005
pearl furnace
oh wait that's binomial
if it was binomial would i just guess?
empty sand
yeah, there's no inverse normal for binomial
pearl furnace
oh okay
empty sand
that's why in binomial the critical regions are never decimals
pearl furnace
yeahh
do u know how to do b?
i dont know why they did it like this
i thought i wouldve had to use inverse normal
pearl furnace
it didnt say given that
pearl furnace
how was i supposed to recognise?
empty sand
and for a reason I can't remember, when you do given that in these types of questions, you've only gotta consider one of them
pearl furnace
and for a reason I can't remember, when you do given that in these types of ques...
wdym?
empty sand
wdym?
look in the ms
it should be
(P(X>m) n P(X>15))
/P(X>15)
but it's just the m
empty sand
I think you have to consider the values it can take
smth like that
it's probably in my notes somewhere
pearl furnace
yeahh cause sometimes you gotta do like p(15<x<20) for example
empty sand
yeahhh
pearl furnace
it's probably in my notes somewhere
if you find them send it pls 😭
empty sand
if you find them send it pls 😭
will do