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Arsey's S1 Edexcel Summer 2013 Model Solutions BOTH PAPERS Watch

1. I done my S1 exam this Jan. But, I am fuming that 3 people actually negged Arsey. One doesn't simple neg Arsey
2. ahhh thank you so much. but cant believe i forgot to put a 0 in the centre of the venn diagram! aggh what a stupid mistake to make!!
3. (Original post by lolipanda)
ahhh thank you so much. but cant believe i forgot to put a 0 in the centre of the venn diagram! aggh what a stupid mistake to make!!
i didn't put a 0 either does that mean we'll lose a mark?
4. (Original post by Fas)
hahaha likewise ! i ended up getting k = 0.0583 first and i was like " wait this isn't right " then realised that 5k had to be 1 haha
Omg I did that too!

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5. is there anything like error carried forward in S1
6. (Original post by alexandraa)
Omg I did that too!

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wow same! it confused me so much, i had to leave that question to the end. ha nice to know other people got confused too, at least i got it right in the end

(Original post by Tee Logan x)
i didn't put a 0 either does that mean we'll lose a mark?
i've no idea, i did see a mark scheme once where a mark was taken off if the candidate had put nothing (i.e. written nothing) instead of put a 0, but at the end of the day its just one mark. still a frustrating one to lose though.

(Original post by physicshelper)
is there anything like error carried forward in S1
yes there is, they shouldnt penalise you for any one mistake more than once, so if a future part to a question involves an answer you previously worked out, you should get ecf.
7. (Original post by lolipanda)
wow same! it confused me so much, i had to leave that question to the end. ha nice to know other people got confused too, at least i got it right in the end

i've no idea, i did see a mark scheme once where a mark was taken off if the candidate had put nothing (i.e. written nothing) instead of put a 0, but at the end of the day its just one mark. still a frustrating one to lose though.

yes there is, they shouldnt penalise you for any one mistake more than once, so if a future part to a question involves an answer you previously worked out, you should get ecf.
I know right. Tbh all the marks i lost are like the ones you feel like ripping your hair out for :P
8. (Original post by Graham981)
The question was out of 5 marks, so based on previous mark schemes :

1 mark for attempt at ∑fx
1 mark for mean = 24.2 (3s.f./or correct rounding)
1 mark for an attempt at σ , (following through mean)
1 mark for a correct expression including square root, (follow through mean)
1 mark for s= 9.29 (3s.f./or correct rounding)

So you would gain around 3 marks out of 5, ie lose 2 marks.
Okay so I calculated ∑fx incorrectly, and then didn't get the mean. So that's two gone. For the next two steps, would I get the marks despite using incorrect value for the mean? I got the standard deviation wrong, because of incorrect mean value, so at least 3 marks gone there. Thank you very much for the help it's really appreciated.
9. you know the test question where we had to find the mean and standard deviation
i got that wrong because i forgot to make the data continuous
how many marks will i lose for that question if error is carried forward
thax alot
10. (Original post by mynameisntbobk)
Not at all
Ah okay, thanks!! (:

This a list of the previous grade boundaries (taken from Arsey's spreadsheet) showing 100, 90, 80, and 70 UMS respectively:

Jan-13 75 68.0 61 54
Jun-12 75 68.0 61 54
Jan-12 72 66.0 60 54
Jun-11 75 68.0 61 53
Jan-11 73 66.0 59 52
Jun-10 69 62.0 55 48
Jan-10 75 70.0 65 58
Jun-09 75 67.5 60 52
Jan-09 71 64.0 57 50
Jun-08 72 66.0 60 54
Jan-08 75 69.0 63 56
Jun-07 72 65.0 58 51
Jan-07 75 68.0 61 54
Jun-06 71 65.0 59 53
Jan-06 75 68.5 62 55
Jun-05 67 60.0 53 46
Jan-05 68 62.0 56 50
11. (Original post by Arsey)
If you were on about putting in zero in the empty regions, then I doubt that matters. If you meant something else then I didn't read it properly.
Sorry, I realise I'm being a massive pain in the arse. For the venn diagram I didn't include the values 9, 64 and 77. Would you guess that as one or two marks lost? Thank you, hope that's clearer.
12. (Original post by physicshelper)
you know the test question where we had to find the mean and standard deviation
i got that wrong because i forgot to make the data continuous
how many marks will i lose for that question if error is carried forward
thax alot
It depends on what you wrote down for that question eg. whether or not you got method marks.
13. GUYS PLEASE ANSWER for question 1c I put that the points lie close to a straight line, will I get the mark ????
14. (Original post by Xx4L3x)
GUYS PLEASE ANSWER for question 1c I put that the points lie close to a straight line, will I get the mark ????
Probably.
15. For question 1f) I said the difference was negative 7.5 as the height was increasing; I got so worked up as to weather or not to put a negative.... will i lose a mark for this?
16. (Original post by Xx4L3x)
GUYS PLEASE ANSWER for question 1c I put that the points lie close to a straight line, will I get the mark ????
I think you should, since if points lie close to a straight line, it would mean there is a strong correlation which would have similar meaning to "r is close to -1 hence strong (negative) correlation".
17. (Original post by AvaM)
For question 1f) I said the difference was negative 7.5 as the height was increasing; I got so worked up as to weather or not to put a negative.... will i lose a mark for this?
i doubt it
18. Any chance of 69 = 100 ums like it did a couple years ago?

After all seems like a lot of people didn't like this paper

i'm such a weirdo how could i do better on this than c1 haha
19. (Original post by AvaM)
For question 1f) I said the difference was negative 7.5 as the height was increasing; I got so worked up as to weather or not to put a negative.... will i lose a mark for this?
I think they may accept ±7.5, depending on mark scheme.
20. (Original post by Graham981)
I think you should, since if points lie close to a straight line, it would mean there is a strong correlation which would have similar meaning to "r is close to -1 hence strong (negative) correlation".
The only thing that is making me doubt getting this mark is that it said "state whether or not your value supports" and I didnt use -0.95 but obviously I new that ???

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