Mathematics: Post your doubts here!

[Rutzaba]

Didn't you give the papers a long time ago ?

u=4s
P(X>5)=0.15
(z>(5-4s/s))=0.15
1-Phi(5-4s/s) = 0.15
Phi(5-4s/s)=0.85
5-4s/s=invPhi(0.85)

now derive the value of s.. and mean = 4*s

yeah i was helping sum one and i got it and i del the post xD

 

[Rutzaba]

Didn't you give the papers a long time ago ?

u=4s
P(X>5)=0.15
(z>(5-4s/s))=0.15
1-Phi(5-4s/s) = 0.15
Phi(5-4s/s)=0.85
5-4s/s=invPhi(0.85)

now derive the value of s.. and mean = 4*s

listen can you do 5 part three of the same year?please

 

[syed1995]

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_s10_qp_62.pdf

Question 3. Solve this while showing all the working. Please.

 

[syed1995]

listen can you do 5 part three of the same year?please

ummm? no part three there? you mean b iii?

 

[19islandprincess96]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w11_qp_62.pdf
qoestion no. 1 ..... how do u calculate s.d (standard deviation )

http://papers.xtremepapers.com/CIE/...d AS Level/Mathematics (9709)/9709_y13_sy.pdf
Go to page 34, apply the first formula.

 

[aniketjain]

th

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_y13_sy.pdf
Go to page 34, apply the first formula.[/quote

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_y13_sy.pdf
Go to page 34, apply the first formula.

thnku i got it ..

 

[aniketjain]

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w11_qp_62.pdf
question no. 3 plzzz

 

[aleezay]

For c.f curves, what is the median??? (n+1)/2 th term or the n/2th term?

 

[railey]

Salaam Alaykum, Please help:
Esme noted the test mark, x, of 16 people in a class, she found that Σ x= 824 and that the standard deviation of x was 6.5
i) Calculate Σ (x-50) and Σ (x-50)²
ii) One person did the test earlier and her mark was 72. Calculate her new mean and standard deviation of the marks of all 17 people.


Thanks in advance Ali Railey​

 

[Rutzaba]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w09_qp_62.pdf
detailed explanation plz... try finding these questions solved and plz gimme ... plz... plz... plz
syed1995
1ii
4b
4ii
7ii

 

[AliHasib]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w11_qp_62.pdf
question no. 3 plzzz

3(1) (11C11x10C2x8C2) + (11C9x10c3x8c3) + (11C7x10C4x8C4)

 

[Esme]

Salaam Alaykum, Please help:​

Esme noted the test mark, x, of 16 people in a class, she found that Σ x= 824 and that the standard deviation of x was 6.5​

i) Calculate Σ (x-50) and Σ (x-50)²​

ii) One person did the test earlier and her mark was 72. Calculate her new mean and standard deviation of the marks of all 17 people. ​

​

​

Thanks in advance Ali Railey​

"Esme"

Sorry for the useless post...

 

[iFuz]

"Esme"

Sorry for the useless post...

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w09_qp_62.pdf
Question 7 part (ii) Please?

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w11_qp_62.pdf
Question 3 part (ii) ?
Greengage one's?

 

[Ryan123]

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w09_qp_62.pdf
Question 7 part (ii) Please?

http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w11_qp_62.pdf
Question 3 part (ii) ?
Greengage one's?

abt the Greengage one not 100% sure but its like this
*R*E*E*N(GG)A*E* if you consider both g's as 1 then there is 7 letters and the starts as places where the g's can be then there are 7 slots since in one slot the 3rd g will be placed in the other gg's got 6 slots so its 7!*6/3!(for the eees)

 

[iFuz]

abt the Greengage one not 100% sure but its like this
*R*E*E*N(GG)A*E* if you consider both g's as 1 then there is 7 letters and the starts as places where the g's can be then there are 7 slots since in one slot the 3rd g will be placed in the other gg's got 6 slots so its 7!*6/3!(for the eees)

But what about other G ?

And other question?

 

[iFuz]

When do we take values of
eg.

P(X < k) = 0.7465

When will we take

phi(k) = 0.7465

and how will we know that if its correct of we should use.

1 - phi(k) = 0.7465

 

[19islandprincess96]

For c.f curves, what is the median??? (n+1)/2 th term or the n/2th term?

When its an even number take n/2 and when its an odd number take n+1/2. I think.

 

[m.adam]

When do we take values of
eg.

P(X < k) = 0.7465

When will we take

phi(k) = 0.7465

and how will we know that if its correct of we should use.

1 - phi(k) = 0.7465

assalam walaikum
brother... if it is phi(-k)=0.7465
according to the rule phi(-k)= 1- phi(k)
hope that helps

 

[daviruss]

Salaam Alaykum, Please help:​

Esme noted the test mark, x, of 16 people in a class, she found that Σ x= 824 and that the standard deviation of x was 6.5​

i) Calculate Σ (x-50) and Σ (x-50)²​

ii) One person did the test earlier and her mark was 72. Calculate her new mean and standard deviation of the marks of all 17 people. ​

​

​

Thanks in advance Ali Railey​

 

[lisahamed]

http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w11_qp_61.pdf no.5 i
the examiners report says to use 0.97 as the probability :S