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

1. what did everyone get for Q2 （16 staff and 14 children question ）the figure for S2 （var ）is it about one thousand something?
2. (Original post by Navo D.)
1587 iirc yeah, hopefully we're both right. What'd you write for the last part of the stratified sampling question?
Was it to explain the difference ? Because n in small standard error is high.
3. (Original post by xyzmaster)
Was it to explain the difference ? Because n in small standard error is high.
Yeah that one. Ah okay I wrote something similar
4. I did the last decade's worth of papers in preparation but this is the hardest paper I've seen. Doable, just.
5. (Original post by haonan)
what did everyone get for Q2 （16 staff and 14 children question ）the figure for S2 （var ）is it about one thousand something?
1026 yes
6. (Original post by xyzmaster)
Was it to explain the difference ? Because n in small standard error is high.
Oh yes, Im not sure about that one I just wrote the sampling didn't give the full representation of the population
7. (Original post by haonan)
what did everyone get for Q2 （16 staff and 14 children question ）the figure for S2 （var ）is it about one thousand something?
1026.3...
8. (Original post by Navo D.)
Yeah that one. Ah okay I wrote something similar
What was your spcc. -6?
9. (Original post by haonan)
what did everyone get for Q2 （16 staff and 14 children question ）the figure for S2 （var ）is it about one thousand something?
1026........

10. Forgive me if I'm wrong
11. (Original post by xyzmaster)
What was your spcc. -6?
0.6 lol
12. For the contingency table (6c?) you proved 27... by dividing by 50?
13. Wasn't 1026.3 wrong? Because I misread the question at first and it talks about WHOLE population
14. Is there a grade boundery which edexcel use to deviate from or is it solely dependent on how students do overall in the exam??
15. (Original post by Navo D.)
0.6 lol
Nah it was a negative correlation. Less pages - more sales or whatever it was.
16. (Original post by STATER)
For the contingency table (6c?) you proved 27... by dividing by 50?
Wasn't it by 100?
17. (Original post by STATER)
Nah it was a negative correlation. Less pages - more sales or whatever it was.
I also got 0.6. Probably depends how you do your ranks
18. (Original post by STATER)
Nah it was a negative correlation. Less pages - more sales or whatever it was.
Sounds like one where they'd take either.
19. (Original post by Saracen's Fez)
Wasn't it by 100?
For me it was coming out as half the value so not seeing what the problem was I made it 50
20. (Original post by STATER)
For the contingency table (6c?) you proved 27... by dividing by 50?
I think is dividing by 100...

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