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# Official Edexcel S3 thread Wednesday 20 May 2015 Morning [6691] watch

1. (Original post by Mutleybm1996)
You missed that?!?
It was only...6? Marks

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Yeah, I didn't even turn the page expecting a part B) or anything considering it was already 9 marks >.< + 5ii that's a total of 12+ marks at least dropped :/
2. (Original post by Xin Xang)
Although I did get the same answer, I didn't use that method. Instead I simply subtracted the variances due to the dependence of the two samples and used that value. It did work but I'm wondering how many marks I would get?

I hate S3.
I DID THE same as you!!!!! Just did minus U bar because not independent, I got write answer hopefully we get all the marks but working out wrong? How many marks do people think we will get? Does answer get all marks
3. (Original post by kingmathematica)
Like I promised earlier, I am posting the questions from S3. I don't know how useful it is to everyone, but I hope people can come up with an unofficial. And, I must say it is a very tricky paper.
Have you got 6a)? I've done solutions for 1-5 btw
4. (Original post by Mutleybm1996)
25 25 25 25
Uniform distribution

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great, i lost so many marks now, probs like 6 + 2(the m= 0.5 question, i did 5% sig level, and said it doesnnt equal 0.5) + how much this was for???
5. (Original post by Mutleybm1996)
25 25 25 25
Uniform distribution

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I don't think so. Wasn't it a continuous uniform, not discrete
6. (Original post by Gome44)
I don't think so. Wasn't it a continuous uniform, not discrete
Yes. There were different values not 25 to each
7. (Original post by Gome44)
I don't think so. Wasn't it a continuous uniform, not discrete
Ye wasn't it 40 30 20 10 or have I messed up bigtime lol
8. (Original post by Navo D.)
Ye wasn't it 40 30 20 10 or have I messed up bigtime lol
Something like that
9. (Original post by Navo D.)
Ye wasn't it 40 30 20 10 or have I messed up bigtime lol
It was definitely 40, 30, 20 and 10 dude dont worry haha. It was unifoally distributed with length from 0 to 10, first length was 4, second was 7-4 so 3 and so on
10. (Original post by Navo D.)
Ye wasn't it 40 30 20 10 or have I messed up bigtime lol
if this is right, then thank god, if i only got one frequency wrong do i still get the marks?/follow through etc? like how many could i lose?
11. (Original post by Gome44)
Have you got 6a)? I've done solutions for 1-5 btw
Could you post 1-5 please
12. (Original post by MentalMath)
I DID THE same as you!!!!! Just did minus U bar because not independent, I got write answer hopefully we get all the marks but working out wrong? How many marks do people think we will get? Does answer get all marks
I think we would get 2 marks if the examiner is fairly competent or 5-6 marks if the examiner doesn't know what they are doing.
13. i think we should all post how many marks on we lost (on avg), after an unofficial markscheme to calculate an unoffical grade boundary (maybe it will help us feel better about the paper lol)
14. (Original post by mmms95)
if this is right, then thank god, if i only got one frequency wrong do i still get the marks?/follow through etc? like how many could i lose?
No idea, though you should get all the method marks available so maybe 4-5?
15. I've made a poll!! Vote honestly so we can get an idea of grade boundaries
http://www.thestudentroom.co.uk/show....php?t=3344193
16. (Original post by mmms95)
great, i lost so many marks now, probs like 6 + 2(the m= 0.5 question, i did 5% sig level, and said it doesnnt equal 0.5) + how much this was for???
i wrote that then crossed it out as it said distance away from the centre so used 1/10 * distance

knew i got it wrong hahaha ****
17. Never would've thought that M3 would go better than S3
18. (Original post by Gome44)
I don't think so. Wasn't it a continuous uniform, not discrete
That's 9 marks down the drain then
Plus the 8 from 5d

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19. I'm posting solutions in a sec, just need to upload the photos
20. i hope the examiner is drunk

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