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S2 Summer 2009 Tweet

Maths exam discussion - share revision tips in preparation for GCSE, A Level and other maths exams and discuss how they went afterwards.

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• View Poll Results: expected grade for S2 Summer 2009 (edexcel)
 A 36 50.70%
 B 17 23.94%
 C 11 15.49%
 D 3 4.23%
 E 4 5.63%
 other... 0 0%

1. Re: S2 Summer 2009
(Original post by vinsta)
i reckon 62/63 for an A this year.
nah i reckon we could be looking lower (hopefully)...more like 59/60 due to the last 2 parts of question 8

that's what I hope at least
2. Re: S2 Summer 2009
(Original post by n_251)
nah i reckon we could be looking lower (hopefully)...more like 59/60 due to the last 2 parts of question 8

that's what I hope at least
I'm hoping this too, although I found q7 harder than 8

anyone remember how many marks for 7d?
3. Re: S2 Summer 2009
(Original post by ClaireHogben)
I'm hoping this too, although I found q7 harder than 8

anyone remember how many marks for 7d?
which q was that? the money one was 4.
4. Re: S2 Summer 2009
(Original post by n_251)
nah i reckon we could be looking lower (hopefully)...more like 59/60 due to the last 2 parts of question 8

that's what I hope at least
For a "normal paper" you could expect anything between 63 to 66 for an A.

A slightly harder paper would probably be only be 61/62 at most. It's almost never lower if you look at all the exminer's reports.
5. Re: S2 Summer 2009
for question seven how many marks will i get if i found the wrong value of a and b but did the correct method to find the standard deviation
6. Re: S2 Summer 2009
(Original post by vinsta)
which q was that? the money one was 4.
the lower quartile of f(x)
7. Re: S2 Summer 2009
Great I don't even remember half my answers!

Actual paper anyone =)?
8. Re: S2 Summer 2009
lq, was 3 i think
9. Re: S2 Summer 2009
(Original post by vc94)
I've worked through the paper, see if you agree!
From what I can remember, i agree with a lot of it and theres nothing that i disagree with. So i guess the space in between is my maximum of lost marks.

Although I know that I messed up on the 'statistic' definition type questions. Got c right but my answers to a and b are vague to non-existant.
Last edited by Gone Revising; 02-06-2009 at 00:24.
10. Re: S2 Summer 2009
You know for question 3, isn't x(bar) (i) not a statistic?
11. Re: S2 Summer 2009
For a "normal paper" you could expect anything between 63 to 66 for an A.

A slightly harder paper would probably be only be 61/62 at most. It's almost never lower if you look at all the exminer's reports.
meh the M1 I did in Jan had 49 as the A boundary but this exam was not as much of a bitch as that one

still, I can live in hope eh? albeit false hope
12. Re: S2 Summer 2009
(Original post by siQ)
You know for question 3, isn't x(bar) (i) not a statistic?
it is a statistic, because its the sample mean, which can be calculated... as opposed to the population mean, which can't
13. Re: S2 Summer 2009
yh s2 exams are usualy in the low mid 60's, 64 in jan 09
14. Re: S2 Summer 2009
(Original post by siQ)
You know for question 3, isn't x(bar) (i) not a statistic?
X bar is a statistic, as xbar is a sample parameter, the unknown was the population parameter (mew?)sp
15. Re: S2 Summer 2009
i think i got 63.

Hope its an A!
16. Re: S2 Summer 2009
(Original post by siQ)
You know for question 3, isn't x(bar) (i) not a statistic?
but it isnt taken from a population. and in the question they told you mu and sigma were unknown.
17. Re: S2 Summer 2009
(Original post by Gone Revising)
X bar is a statistic, as xbar is a sample parameter, the unknown was the population parameter (mew?)sp

Aww... thats what i get for last min revision..

Thanks.
18. Re: S2 Summer 2009
The last last profit question was easy (£216) but the the rest of that question and the previous question where quite ****** up. I got E(X) as 1 for part 7a and I couldn't even work out a and b for I think 7b (? ax, b-ax)
19. Re: S2 Summer 2009
Out of 30 people in the room that sat S2 alongside me, only 1 person said they were able to prove that x=1.7 for the x length question!!! Pisstake
20. Re: S2 Summer 2009
(Original post by Virus.exe)
The last last profit question was easy (£216) but the the rest of that question and the previous question where quite ****** up. I got E(X) as 1 for part 7a and I couldn't even work out a and b for I think 7b (? ax, b-ax)
You had to work it out using the area of the triangle. They put it in the question as a clue I guess.