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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. (Original post by Lamatata)
For the Normal Distribution question, I forgot to change 55 to 55.5, how many marks will I lose?
Not sure but probably quite a few ...
2. I'll be posting model solutions this evening as I did with C4.
3. (Original post by Woffus)
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?
>55= 56 or more

correction

>=55.5

as 55.5 would round to 56
4. (Original post by fefssdf)
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 ?
The A* in further maths requires an avg of 90 over 3 (non C3/4) modules, I was probably averaging slightly below that before the paper, and now I'm boarderline 90 with my best case scenario of this paper.. So I don't think I've made it

The annoying thing is, everything I've answered I understood, and I've either made a stupid mistake by not thinking or a calculator/arithmetic error somewhere.. The grade boundaries are too tight to let me off from stupid mistakes:/
5. (Original post by dnpnstn)
The A* in further maths requires an avg of 90 over 3 (non C3/4) modules, I was probably averaging slightly below that before the paper, and now I'm boarderline 90 with my best case scenario of this paper.. So I don't think I've made it

The annoying thing is, everything I've answered I understood, and I've either made a stupid mistake by not thinking or a calculator/arithmetic error somewhere.. The grade boundaries are too tight to let me off from stupid mistakes:/
ohhh sorry for my misunderstanding as a non-further maths person ! .. ah yeh I know what you mean about silly mistakes - in c3 I made several silly mistakes and that has cost me my A* in normal maths because in c4 I got pretty much all of it right - why is maths so harsh ! damn
6. (Original post by Student403)
Basically 342.25 would have worked if you took the negative square root at the bottom but idk

I think and hope it's 225 cause that worked flawlessly when i plugged it back in and it only asked for 1 value
yeh the numbers came out really good with 225 so i wouldnt worry
7. How many marks was E(A) guys??
8. (Original post by yusraa_96)
I got 342 too! is it wrong?
both answers you should've got but i think u only put one of them down as like a definite so "n= 225 and n= 342 (what ever) and therefore n=225"
9. (Original post by Michaelj99)
both answers you should've got but i think u only put one of them down as like a definite so "n= 225 and n= 342 (what ever) and therefore n=225"
The other solution was negative

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10. Guys can I get a quick opinion on UMS for 66/75 S2, 62/75 for C3, 62/75 for C4?

11. (Original post by hello2you)
How many marks was E(A) guys??
4 marks

I'd guess one for using E(R) to find E(A), two for finding E(R^2), one for accuracy of the answer
Guys can I get a quick opinion on UMS for 66/75 S2, 62/75 for C3, 62/75 for C4?

13. Hey guys, I also found S2 quite difficult today compared to past papers. I need an A in Math. Let's say I got A in C3, A* in C4 and B/C in S2, can I still get an A?
14. (Original post by hello2you)
How many marks was E(A) guys??
4 marks !
15. (Original post by hasanlucy)
Hey guys, I also found S2 quite difficult today compared to past papers. I need an A in Math. Let's say I got A in C3, A* in C4 and B/C in S2, can I still get an A?
yes
16. (Original post by kingaaran)
The other solution was negative

Posted from TSR Mobile
for this question I didn't end up with a quadratic... I had the mean = 0.02n and then variance i had it as 0.16n.. is this wrong ?
17. (Original post by hasanlucy)
Hey guys, I also found S2 quite difficult today compared to past papers. I need an A in Math. Let's say I got A in C3, A* in C4 and B/C in S2, can I still get an A?
Of course you can! I think it depends on how you did last year, what was your ums ?
18. What did you get for mean and variance?(not question 1) I got 1.2 for mean and 0.24 for variance
19. (Original post by dnpnstn)
4 marks

I'd guess one for using E(R) to find E(A), two for finding E(R^2), one for accuracy of the answer
I'm fairly sure it was 3 marks.
20. (Original post by fefssdf)
yes
I'm sure I've dropped about 20 marks in S2, just praying for lower grade boundaries!

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