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

1. (Original post by MentalMath)
The one where it said what should the boys conclusion be I put the correct answer but I said at the 1% level not realised it is the same for all v=3, so I thi9nk they will deduct 1 mark right?
Oh damn, I made the same mistake. Are you me lol?

I think that the grade boundaries are going to be such that 67-68 would get you 93-95 ums.
2. questions 6e , grand total is not 100, add up observed and you get 200 so (130x39)/200
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.
I have the solutions but can't upload them. I think someone else has done it already though
4. (Original post by Gome44)
I have the solutions but can't upload them. I think someone else has done it already though
What wash your confidence interval part 4B. That's the only things that's wrong on the other one.
5. (Original post by Gome44)
I have the solutions but can't upload them. I think someone else has done it already though
6. (Original post by mmms95)
questions 6e , grand total is not 100, add up observed and you get 200 so (130x39)/200
Nope. The grand total is 100.

I think you may have added the "total collumn" on by accident.
7. for the mu =0.5 if you test at 5% level and say H0 is wrong can u still get the marks? cause you can set the sig level right?
8. (Original post by xyzmaster)
What wash your confidence interval part 4B. That's the only things that's wrong on the other one.
9. (Original post by Xin Xang)
Nope. The grand total is 100.

I think you may have added the "total collumn" on by accident.
you're right, dammnit
10. (Original post by Gome44)

I did the same thing
11. (Original post by varshanct95)
I'll upload the photos one at a time
12. (Original post by Xin Xang)
I did the same thing
Thank you
13. Does my stats 3 result have to go towards my further maths finals grade or can it go towards my maths finals grade?
14. (Original post by Amandeep_3)
Does my stats 3 result have to go towards my further maths finals grade or can it go towards my maths finals grade?
15. (Original post by mmms95)
for the mu =0.5 if you test at 5% level and say H0 is wrong can u still get the marks? cause you can set the sig level right?
this questions is really bothering me, anybody???
16. (Original post by Xin Xang)
I did the same thing
(Original post by xyzmaster)
Thank you
Hey so guys I did the exact same thing but i forgot the divide by 10 bit in the initial instance. so my sigma value was a power of ten out. otherwise my steps were the same, how many marks will I lose?
17. (Original post by shloke123)
Hey so guys I did the exact same thing but i forgot the divide by 10 bit in the initial instance. so my sigma value was a power of ten out. otherwise my steps were the same, how many marks will I lose?
Its normally "correct answer with no incorrect working seen" in which case accuracy marks are lost but you don't have to work out sigma to find the interval so you might get all the marks.
18. worst S3 exam made up of 6 exercise what the ... ex5 and 6 were so bull**** in my school out of the 40 students taking the exam not even one was okay with it
19. (Original post by STATER)
Its normally "correct answer with no incorrect working seen" in which case accuracy marks are lost but you don't have to work out sigma to find the interval so you might get all the marks.
you do have to work out sigma? Its the mean plus or minus 1.96 x sigma over root 150 haha. And my sigma was a power of 10 out so my answers are also slighlty off. but my methd is correct. So i'll definitly lose marks, just how many is my question haha
20. (Original post by shloke123)
you do have to work out sigma? Its the mean plus or minus 1.96 x sigma over root 150 haha. And my sigma was a power of 10 out so my answers are also slighlty off. but my methd is correct. So i'll definitly lose marks, just how many is my question haha
Sigmas constant isnt it?
Anyways I got the same answer.

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