statistics n09

[Freaked12]

hey im stuck!!

n09 Q5 (a) (i) (ii) and b (ii)

5000 till 6000
so five is fixed
5xxx
5P3=60

part 2)
5xxx
any number could come
so 5C5(6C1)(6C1)(6c1)

[khi2ruh]

Thanks

could u please answer part b(ii) of the same question

[ifraha18]

thnku so muich..

[Freaked12]

Thanks

could u please answer part b(ii) of the same question

6 boys  8 girls

  5 pupils
either they are in the team or all are not in the team

11C2(because only two places will be left if they all are in the team and there will be 11 people altogether remaining if 3 boys are already in the team) +11C5( 3 boys cannot enter so 11 people remaining for 5 places)

[khi2ruh]

wow u r so smart

u r a life saviour!! r u gonna do the exam in the mornin or r u a teacher?

[Freaked12]

wow u r so smart

u r a life saviour!! r u gonna do the exam in the mornin or r u a teacher?

yeah i am going to do
wish me luck
i am not a genius By the way.i just worked really hard for statistics which is basically my weakest subject

[khi2ruh]

huhuh!!!

u r definitely kidding!!!!!!!!!!!

[Freaked12]

huhuh!!!

u r definitely kidding!!!!!!!!!!!

wallah

[khi2ruh]

oh dear the percentile is goin go high!!!

[khi2ruh]

r u in pakistan??

[khi2ruh]

neways n09 q1 part 2
variant 2 please

[Freaked12]

neways n09 q1 part 2
variant 2 please

Sorry man i went to sleep

3 hours to go for CIE exam.

I dont have the question paper for this but i think this is the one where you have to find standard deviation sa7?

x<39=0.25 (as this is the lower quartile)
and then
(39-51)sigma=0.25

1-0.25=0.75
which if you look at the table at the bottom on the normal distribution graph states the corresponding value to be 0.674
which will be -0.674 because its on the negative side

-12/sigma=-0.674
sigma=
-12/-0.674=sigma
sigma=17.8