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Edexcel S2 - 27th June 2016 AM

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• View Poll Results: How did you find the Edexcel S2 exam?
Very hard
145
14.71%
Hard
331
33.57%
Normal
293
29.72%
Easy
152
15.42%
Very easy
65
6.59%

1. Is there an unofficial mark scheme?
2. (Original post by keres)
Anyone up for doing an unofficial mark scheme?
It would be difficult since many people can't remember answers like 0.8337 ect haha - I'm just hoping that physics and maths tutor would've got hold of the paper and the model answers will be uploaded soon !
3. (Original post by imran_)
c1: 90
c2: 86
s1: 70

c3: 74
c4:78
s2: 55 marks ( maybe a B?)

lol there goes my A
Im the exact same, bye bye uni

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4. Would I get any marks for this?! Question 5) Normal approx...X~B(n,0.2)E(X)=0.2nVar( X)=0.16ntherefore; X~N(0.2n,0.16n) P(X>55)=> CC P(X>=55.5)P(Z>(55.5-0.2n)/rt0.16n)=0.04011-P(Z<(55.5-0.2n)/rt0.16n)=0.0401P(Z<(55.5-0.2n)/rt0.16n)=0.9599Therefore;(55.5-0.2n)/rt0.16n = 1.7555-0.2n= 1.75(0.4)(n^1/2)55-0.2n=0.7n^1/2Then I squares out formed a quadratic and tried to rearrange but it didn't solve (yielded imaginary numbers) How many marks out of 8 would I get if any? Was I on the right lines or have I lost the plot.
5. (Original post by keres)
Anyone up for doing an unofficial mark scheme?
I will if someone gets me the paper.
6. (Original post by Supermanxxxxxx)
Im the exact same, bye bye uni

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my firm wanted ABB, so im not too fussed with a B in maths but could've done better
7. (Original post by imran_)
my firm wanted ABB, so im not too fussed with a B in maths but could've done better
I need aaa so literally just screwed my plans for dentistry

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8. (Original post by cjlh)
Lol of all the things to slip up on I got the variance in the first question wrong. All right other that that it looks like, beaming.
hahah same I couldn't for the life of me remember how you would work it out.. I ended up with an answer of -19600 look
9. (Original post by imran_)
my firm wanted ABB, so im not too fussed with a B in maths but could've done better
When you're actually at uni I'm sure you'll feel better
10. (Original post by Supermanxxxxxx)
I need aaa so literally just screwed my plans for dentistry

Posted from TSR Mobile
ahhhh I hope you still get it - I'm sure the boundaries will go down a bit !
11. Is the median of a quadratic pdf = the interval/2 ?
12. Can someone explain why you use 55.5 as a correction rather than 54.5?
Think I ended up getting 221 students so how many marks would i lose if thats the only mistake?
13. (Original post by fefssdf)
Twitter was sending lots of hate towards Peter so hopefully that counts in our favour .

My profile pic is a page of chapter 2 from c3
Poor Peter lol

Ah okay!
14. For the Normal Distribution question, I forgot to change 55 to 55.5, how many marks will I lose?
15. I got between 68-71 because I dicked up Q3 by using E(R)^2 instead of E(R^2) and then, after using a continuity correction, did the question again to check my working without the correction, and got 223 ))))) RIP me, there goes the A*
16. (Original post by Armpits)
This is so depressing, needed to do well in S2 to get an A, probably got a B now, will consider suicide.
i feel u mate.. I might do the same thing..
17. (Original post by Student403)
Poor Peter lol

Ah okay!
I know ahaha
18. can you integrate pi*R^2 and divide by 4 for the mean area. I got the same answer using this method..
19. (Original post by dnpnstn)
I got between 68-71 because I dicked up Q3 by using E(R)^2 instead of E(R^2) and then, after using a continuity correction, did the question again to check my working without the correction, and got 223 ))))) RIP me, there goes the A*
for an a* you need 90ums average across C3 and C4... your grade in S2 has no weight whatsoever towards whether you do/don't get an A*, unless you're concerned about the individual grade of the unit itself ?
20. Anyone who did S2 IAL?

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