A level Statistics doubt??Post your doubts here!

[Alice123]

http://papers.xtremepapers.com/CIE/...S 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

 

[A star]

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

atleast urs must be better then mine

 

[abruzzi]

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_s11_qp_61.pdf
I need help with qn no. 4(iii).. could someone please explain the concept?
Thanks

 

[A star]

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

well
meu= 7/3 x sigma put it in
(Z>2meu-meu/sigma)=0.1016
7sigma square / 3sigma =1.272
7sigma=3.819
sigma=0.546

 

[MustafaMotani]

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

 

[MustafaMotani]

When we are asked to draw cummulative frequency graphs, do we have to draw a curve or join all the points with straight line..?

 

[Alice123]

When we are asked to draw cummulative frequency graphs, do we have to draw a curve or join all the points with straight line..?

draw a curve using the max point of the class width... continuous cu frequency curves start frm origin

 

[abruzzi]

We know that
Mean= np
We know the mean and we know n, so find p, which is mean/n= 0.15
Now you need to find the probability of biscuits broken between 2 and 4, which means prob of 2, 3 and 4 biscuits being broken.
P(success)= 0.15
p(failure)= 0.85

Then use the binomial approximation to calculate the probability. (I'm assuming you know this part)

Thanks for your reply..

I think you have checked the wrong question. I was talking about qn 4(iii) of May/June 2011

Please help me if you can..

 

[MustafaMotani]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s11_qp_61.pdf
I need help with qn no. 4(iii).. could someone please explain the concept?
Thanks

sorry for bad handwriting. .

 

[MustafaMotani]

btw do u have a2 bio??? MustafaMotani

nAh.. i am an AS bdw

 

[Alice123]

nAh.. i am an AS bdw

u're smartt!!! the way u did dat qs, dint cum to my mind b4......

 

[MustafaMotani]

u're smartt!!! the way u did dat qs, dint cum to my mind b4......

thanx for the compliment ..
I just draw normal diagrams representing the situation and everything else becomes piece of cake ..

 

[Alice123]

Q7a

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s11_qp_61.pdf

 

[A star]

Q7a

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s11_qp_61.pdf

atleast one 3 means
1-(5/6)^9

 

[A star]

sorry for bad handwriting. .

if you call that bad you would cry if you see mine

 

[Alice123]

atleast one 3 means
1-(5/6)^9

i meant the second part

 

[A star]

i meant the second part

this means that
1-(5/6) is constant what changes is no of trials which means
1-(5/6)^n>0.9

 

[Alice123]

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

 

[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!