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Edexcel S2 Exam Paper January 2011 14/01/11 Watch

1. (Original post by SuperRape)
How did you get the question paper? Are you a wizard?
Yeah, a mathematical one.

I'm sure if you asked them they would copy it for you.
2. (Original post by dundiddyknoe)
:OOOOOO u got 11A* and A*A*A*A*A* prediction for A level and you got rejected by oxford? Are you being ****ing seriouss? OH MY GOD im never going to have a chance!
Yep. I honestly doubt the people who interviewed me had even read my personal statement. It really does come down to their aptitude tests and a few questions at interview.
3. I wonder if all the iffy questions will result to ok grade boundaries?
4. (Original post by Gibbo81)
Q6
hey thanks for the answers.. however i have a doubt,
how come we use m< or equal to 14 and not fifteen? cos i standardised and used 15.5 and so on that loses a lot of total marks!
5. (Original post by Ravikhabar)
hey thanks for the answers.. however i have a doubt,
how come we use m< or equal to 14 and not fifteen? cos i standardised and used 15.5 and so on that loses a lot of total marks!
Because it said less than 15, ie less than or equal to 14. Using the continuity correction goes to 14.5
6. so guys lets predict grade boundary for an A !!!!!!! have we done this already ? oh well lets do it again

I predict its going to be 62/75 for an A .
7. (Original post by Ravikhabar)
hey thanks for the answers.. however i have a doubt,
how come we use m< or equal to 14 and not fifteen? cos i standardised and used 15.5 and so on that loses a lot of total marks!
You'll probably only lose 2 or maybe 3 if they're harsh
8. Here are the marks required for an A since Jan 2001

60
57
58
58
57
61
64
56
61
59
66
66
63
62
65
65
62
65
9. And here for 90ums

68
63
65
64
64
67
70
63
68
66
71
71
69
69
70
70
69
70
10. My guess is A-65 90ums-70
11. (Original post by Gibbo81)
My guess is A-65 90ums-70
I disagree slightly - I think the 90ums will be around 68 or 69 probably due the
2nd question confusing people a bit.
12. (Original post by Gibbo81)
Here are the marks required for an A since Jan 2001

60
57
58
58
57
61
64
56
61
59
66
66
63
62
65
65
62
65
Wow, past few years its always been above 60 !! This paper is going to be around 64 -66 .
13. A - 65 at most
90 UMS [which isn't really A*] - 68-70 UMS.

I suspect people will only lose about 1-3 marks on Q2 alone. I suspect I will lose 1 mark since I said "Teacher's claim is wrong"
14. There weren't any definition questions were there?
15. (Original post by EnVogue)
There weren't any definition questions were there?
Nope - I believe it ain't the first paper not to do this too, so not really surprised. Luckily for me because I wouldn't be able to say what a statistic/critical region is is...
16. (Original post by mr tim)
Nope - I believe it ain't the first paper not to do this too, so not really surprised. Luckily for me because I wouldn't be able to say what a statistic/critical region is is...

Good, I was seriously paranoid I'd missed a question :P
17. i completely messed up question 2)

i got confused and put n=50 and p=0.2
there for my binomial distribution was X=B(50,0.2) instead of X=B(10,0.2)

and when it said the teach thinks that the student 'guessed' the answers i assumed that that meant she thought the student was dumb and therefore the probability was less.

Therefore

i got as H0: p=0.2
H1: p<0.2
significance = 5%
i got an answer which made the critical region 4 and less...
i thought i was right at the time but i know now that im wrong...

Does anyone know how many marks i would lose?..
18. (Original post by DDDanittoo)
i completely messed up question 2)

i got confused and put n=50 and p=0.2
there for my binomial distribution was X=B(50,0.2) instead of X=B(10,0.2)

and when it said the teach thinks that the student 'guessed' the answers i assumed that that meant she thought the student was dumb and therefore the probability was less.

Therefore

i got as H0: p=0.2
H1: p<0.2
significance = 5%
i got an answer which made the critical region 4 and less...
i thought i was right at the time but i know now that im wrong...

Does anyone know how many marks i would lose?..
Sorry to be blunt but probably all of them
19. (Original post by DDDanittoo)
i completely messed up question 2)

i got confused and put n=50 and p=0.2
there for my binomial distribution was X=B(50,0.2) instead of X=B(10,0.2)

and when it said the teach thinks that the student 'guessed' the answers i assumed that that meant she thought the student was dumb and therefore the probability was less.

Therefore

i got as H0: p=0.2
H1: p<0.2
significance = 5%
i got an answer which made the critical region 4 and less...
i thought i was right at the time but i know now that im wrong...

Does anyone know how many marks i would lose?..
3-5 at least if the examier is kind enough to allow ft for your 50 mistake, or else all of it. Your H1 is also wrong, and I will assume that your conclusion is wrong too, since you said that he never guessed? so quite a few marks lost there.
20. The grade boundaries seem to get higher and higher every year

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