A level Statistics doubt??Post your doubts here!

[SexyFag]

Y is 0 if same or greater minus the smaller value of x there Y can only be 0(22 44 66) 2(24 42 46 64) 4(26 62) so for 0 its (.5*.5+.4*.4+.1*.1) for 2 its (.5*.4)*2+(.1*.4)*2 and for 4 its (.5*.1)*2
Y=0 2 4
p y=.42 .48 .1(respectively)
ex = .96.4=1.36

Im still not getting it bro :s

 

[Anika Raisa]

Thank you so much!

umm ok thaanks for help. god bless u with a*s ameen

No problem at all! BOL 4 2mrw! Hope everything goes well!! #fingerscrossed
May Allah help us all while we take our exams Ameen!

 

[walidbinkhalid]

i need help with Q2 probability distribution table! http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_s12_qp_62.pdf

 

[syed1995]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s11_qp_61.pdf
Q5a...... want a simplified calculation... it is taking more than a page... my maths senses arent working

DA HELL.. that question would take a lot of working.. would deffo increase 1 page.. if you get a shorter working tag me!

 

[syed1995]

syed1995

yea?

 

[Alice123]

yea?

https://www.xtremepapers.com/community/attachments/img_20130521_141556-jpg.27185/
sorry bout dat... net connection prob

 

[syed1995]

P(X > 2µ) = 0.1016


3µ = 7σ^2
µ = 7/3σ^2

P(X>2u)
P(X>2u-u/SD)
P(z>u/SD)
P(z>(7 SD^2/3 / SD) =0.1016
P(z>7/3 * SD)=0.1016
z<-(7SD/3 )=-invPhi(1-0.1016)
7SD/3 = invPhi(0.8984)
SD = 3*invPhi(0.8984) / 7

Now Mean will be (7*(SD)^2)/3

 

[syed1995]

https://www.xtremepapers.com/community/attachments/img_20130521_141556-jpg.27185/
sorry bout dat... net connection prob

THANKS alot for that!

 

[A star]

THANKS alot for that!

u douldnt do it
i figured it out

 

[A star]

thanks
PS your signature is giving me a severe headache
A star

 

[Anika Raisa]

i need help with Q2 probability distribution table! http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s12_qp_62.pdf

Xcuse my handwriting! Hope it helps!!!

 

[jjtheslayer]

So, anyone doing p6 tomorrow? :s

 

[syed1995]

u douldnt do it
i figured it out

My method was very long. but I solved it though.

 

[A star]

My method was very long. but I solved it though.

long method means more time consumption it just leaves less time for other mind draining tasks

 

[syed1995]

long method means more time consumption it just leaves less time for other mind draining tasks

naw .. not really it just consumes pages for me.. I just hope in the main paper I don't find the time short to solve all the questions!

My target has always been 1 hour for S1. but hardly meet that target AND PLEASE PLEASE.. NO PLOTTING OF GRAPHS in the coming paper.. -,- especially the CF.

 

[abruzzi]

sorry for bad handwriting. .

Thank you

And yeah.. your handwriting is better than mine

 

[A star]

naw .. not really it just consumes pages for me.. I just hope in the main paper I don't find the time short to solve all the questions!

My target has always been 1 hour for S1. but hardly meet that target AND PLEASE PLEASE.. NO PLOTTING OF GRAPHS in the coming paper.. -,- especially the CF.

cF rocks but if it doesnt then they will give another question that will make me mad

 

[syed1995]

cF rocks but if it doesnt then they will give another question that will make me mad

if we have to draw cfc in paper.. then you're dead for sure!

 

[A star]

if we have to draw cfc in paper.. then you're dead for sure!

tit for tat

 

[syed1995]

tit for tat

haha...