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# Arsey's S1 Edexcel Summer 2013 Model Solutions BOTH PAPERS watch

1. (Original post by Arsey)
I think the only mark you might get is a method mark for standardising.

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Arsey are you a teacher?
2. (Original post by Xx4L3x)
WOw I think 59 / 60 / 61 will be an A. A lot of easy marks were lost and many ran out of time
I agree. I don't know why but I seem to run out of time. I only had 25 mins left to do three questions? I don't even know how?
3. (Original post by 344302)
Can I quickly ask,
For the standard deviation normal distribution question I did p(x<210)=0.99
Corresponding z value was 2.32 from the first table. Do I lose marks for not using the second table? So my answer was 2.155 ( which i rounded to 2.16)?

Am I obliged to use the second table?

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I did this too. The most they can do is only take one mark off, but in our case hopefully not :-)
4. Wow so potentially no marks lost even if we don't round to 3sf in the first question?

Brilliant
5. (Original post by GrandMasterChe)
people *****ing and going all apocalyptic about losing 3-4 overall are the ****ing worst i swear
I would like this if I hadn't run out of liking posts.
6. (Original post by GCSE-help)
Wow so potentially no marks lost even if we don't round to 3sf in the first question?

Brilliant
really ?! thank god haha
7. (Original post by Eviey)
I did this too. The most they can do is only take one mark off, but in our case hopefully not :-)
Hopefully not!

That means I've lost anything from 5-10 marks
8. (Original post by 344302)
Hopefully not!

That means I've lost anything from 5-10 marks
I wonder if youll get an A though !!
9. (Original post by GCSE-help)
Wow so potentially no marks lost even if we don't round to 3sf in the first question?

Brilliant
omg
10. how do you questions when a object bounces of the ground and you have to work out its new velocity etc?
11. (Original post by 344302)
Defo!

I came out the exam thinking yeah boy! And now I'm just like omg I am so stupid. My Venn diagram added up to 1 instead of however many workers there were.. I did she correct shape diagram but I divided all my values by 200 I have no idea why .. How many marks would I lose?
None.

Venn diagrams can show the actual elements in each section, the number of items, or, (in the context of probability), probabilities.

Which is best depends on context, or any explicit instructions. Here you weren't given any explicit instructions, but the subsets were referred to as "events", putting the question in a probability context. So giving probabilities as you did is certainly appropriate. I would be outraged if you lost a mark.

In fact, I think it is more likely that people who did what Arsey and I did would lose a mark for not picking up on the word "event", but I think that is still very unlikely. Almost certainly either choice will get full marks.
.
12. (Original post by Xx4L3x)
I wonder if youll get an A though !!
If you've lost around 5-10 marks its very highly possible of you getting an A on this paper. I don't think the grade boundaries will be ridiculously high.
13. (Original post by Eviey)
If you've lost around 5-10 marks its very highly possible of you getting an A on this paper. I don't think the grade boundaries will be ridiculously high.
I was joking ofc he will get an A it will be about 59 // 60 for an A.
14. 98 ums nevertheless another walk in the park
15. (Original post by MAD Phil)
None.

Venn diagrams can show the actual elements in each section, the number of items, or, (in the context of probability), probabilities.

Which is best depends on context, or any explicit instructions. Here you weren't given any explicit instructions, but the subsets were referred to as "events", putting the question in a probability context. So giving probabilities as you did is certainly appropriate. I would be outraged if you lost a mark.

In fact, I think it is more likely that people who did what Arsey and I did would lose a mark for not picking up on the word "event", but I think that is still very unlikely. Almost certainly either choice will get full marks.
.
That has put me at ease
16. (Original post by Fas)
wouldn't agree with you on that - trawling this thread , theres so many that got the venn diagram wrong and loads at my school messed that one up aswell haha - and a LOT of people didn't finish the exam , although i personally found the Normal distribution the easiest question in the exam ( apart from maybe Q1 and Q2 ) and yeah discrete random variables was fine - took me ****ing ages to work out that 5k = 1 though hahaha , ended up getting 12k + 0.3 = 1 at the start lol
That's interesting that you said people were running out of time. I felt the same way. I had like 25 mins at the end to do 3 questions!
17. For 4f) I just wrote reduced (left out by five), how many marks would that be likely to lose (I got whether they reduced or stayed the same right)? For 1c) I also wrote yes, lie close to a straight line, and on the venn diagram I thought the 0s wouldn't be necessary. They're the only mistakes I made according to this mark scheme and thread, I need 84 UMS so fingers crossed.
18. (Original post by Xx4L3x)
I was joking ofc he will get an A it will be about 59 // 60 for an A.
lol woops sorry! And yeah I think that's a fair prediction for the grade boundaries to get an A (Y)
19. In Core 2 for trapezium rule when it says " 6 intervals" does that mean 6 ordinates?
20. Thanks a lot for this!!!!!

but is it necessary to write decrease "by 5" for 4f) ????
I don't wanna get 99%.......... O.O

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