Mathematics: Post your doubts here!

[Mattman]

No.4 http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s05_qp_6.pdf

What is the accepted way by CIE to find the upper and lower quartile with an even number of terms?
i got 5.4 for LQ and UQ 8.35 according to my teacher's method...but the marking scheme showed 8.3 and 5.4

bump

 

[Wanzi21]

need to clear my doubt.. when is the time to use lower/upper boundary in normal distribution?? for instance mean=20 P(x>18)
when to standardize I often see like this Z=(18.5-20)/(standard deviation.. hmmm

 

[mominzahid]

Its gonna be tough writing here. I suggest khanacademy.org or your teacher

cant expect much from my teacher i dont get him.. :/
saw khan academy videos they were a bit helpful.. i'll try again.. thanks for ur help..

 

[omar hazem]

need to clear my confusion please....when exaclty we use the continuity correction in S1 problems like for example in nov 06 question 5)ii) the mark scheme used the 10 as it is without cc but in june 2011 63 question 5)iii) the mark scheme used the cc......please can u help me in this??

 

[Khan_971]

need to clear my doubt.. when is the time to use lower/upper boundary in normal distribution?? for instance mean=20 P(x>18)
when to standardize I often see like this Z=(18.5-20)/(standard deviation.. hmmm

Usually there's the phrase USE a Suitable approximation

 

[Khan_971]

help me with this plzzz

See. 2 people getting odd numbers froma total of 10 mugs
1st person is who we'll deal with:
can get 1 ,3 ,5 ,7 ,9
Possibilities: 10C1, 10C3, 10C5, 10C7, 10C9
add them up to get total arrangements.

 

[omar hazem]

Usually there's the phrase USE a Suitable approximation

sometimes like june 11 63 they don't say this but in the ms they use cc

 

[smartangel]

http://www.xtremepapers.com/papers/...S Level/Mathematics (9709)/9709_s11_qp_63.pdf
Q3 iii..can someone tell me how exactly do we get midpoints?

 

[smartangel]

http://www.xtremepapers.com/papers/...S Level/Mathematics (9709)/9709_s11_qp_63.pdf
Q6...plzzzz

 

[mukki]

http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w09_qp_61.pdf
http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w09_ms_61.pdf

qstn 3 part i)

100 -100/7 = 0 so frm where this o.5 came????

O 0 is 0.5

 

[hassam]

LAST PRT (V)

 

[Wanzi21]

Usually there's the phrase USE a Suitable approximation

now it has cleared my doubt.. I think lol
thanks

 

[ppaayas]

Does anybody here have a Statistics ebook they would not mind sharing? Please? Please?

 

[Khan_971]

need to clear my confusion please....when exaclty we use the continuity correction in S1 problems like for example in nov 06 question 5)ii) the mark scheme used the 10 as it is without cc but in june 2011 63 question 5)iii) the mark scheme used the cc......please can u help me in this??

CC usually kicks in when theres a ≥ or <= of some value. when theres 'at least' or 'should not be greater than'

 

[omar hazem]

CC usually kicks in when theres a ≥ or <= of some value. when theres 'at least' or 'should not be greater than'

is it always like this??

 

[omar hazem]

and please i need help in question 6 part iv) and v) in nov 10 paper 61 ??
thnx

 

[Khan_971]

is it always like this??

usually.

 

[asexamskillme111]

Find the number of different ways in which the 9 letters of the word GREENGAGE can be
arranged if exactly two of the Gs are next to each other.
Now in this question I understand the way to do it but when I was trying to do it in different way, I hit a wall. I know I'm doing something wrong I just can't figure what is it.
This is what I want to do:
Total number of arrangements - number of arrangements where none of the G's are next to each other.
9!/(3!*3!) - (7*6*5*(6!/3!)). THE ANSWER IS NEGATIVE. WHAT AM I DOING WRONG?

 

[Ashleyxoxo93]

i don't understand why sometimes we square or cube our answers? especially in those questions where they asked the probability of something happened for the next three days or next five churches? can someone please explain it for me? thanks

 

[smartangel]

http://www.xtremepapers.com/papers/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w09_qp_62.pdf
Q1 ii..plz help guys