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[Official Thread] OCR MEI AS Mathematics 2016 (C1, C2 & S1)

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1. (Original post by josephpryor)
Can someone please confirm the LQ UQ?
Uq 7.68
Lq 3.68
2. the s1 paper today crushed my soul
3. (Original post by bob6969)

1i) IQR = 4 (or 4.15 depending on method) Median = 29
ii) No outliers

2i) 0.512
ii) 0.16
iii) 0.66 i think

3i) 120
ii) 1/60
iii) 1/60
iv) 0.1

4i) 50k = 60 so k is 1.2
ii) E(X) = 2.74 Var(X) = 1.232

5i) 0.21
ii) venn diagram
iii) 0.241

6i) mean = 70.19 s.d. = 36.90
ii) 15.7%
iii) histogram drawing
iv) positive skew
v) 20.2%

7ai) 0.1423
B) 0.2108
C) 1.6
ii) p=0.1 h1, p<0.1
iii) Not writing it out
iv) don't reject as 5.3% > 5% so insufficient evidence
I got exactly the same answers for every question lol. Does it matter if I said women had higher average price and men had greater variation than women or do I need to use the word spread?
4. Don't think that's right, i got one in 30's one in late 20's
5. (Original post by Crozzer24)
I got exactly the same answers for every question lol. Does it matter if I said women had higher average price and men had greater variation than women or do I need to use the word spread?
Normally you would say the prices of the womens shoes were more consitent - there was more variation in the prices of mens shoes.
6. (Original post by josephpryor)
Can someone please confirm the LQ UQ?
Seems that IQR questions are very inconsistent but I ended up with IQR=4 LQ=27.8 UQ=31.8 after crossing out 4.15
7. That's the probability the team lost all three games, which is different than a team not winning all three games
8. (Original post by Crozzer24)
Did anyone find 2i fairly long winded for 1 mark or have I done something wrong? I think I got 64/125 I can't quite remember
Think I got this (0.512) but there were a few ways to do it... was it not just 0.8^3?
9. imgur. com/a/4iRS3
10. (Original post by Massoom)
Think I got this (0.512) but there were a few ways to do it... was it not just 0.8^3?
That's what I did
11. (Original post by Massoom)
Think I got this (0.512) but there were a few ways to do it... was it not just 0.8^3?
Lol yes that's why I got but I've gone about it a very long winded way
12. Low or high grade boundaries?
13. (Original post by Hiba.A)
I got 0.66 for 2 (iii)
SAME!
14. (Original post by Crozzer24)
Lol yes that's why I got but I've gone about it a very long winded way

Didnt it say the probability of not losing? doesnt that mean he can draw or win so wouldnt it be 1-(0.2^3) which was like 0.9 something
15. (Original post by reoshinwho)
I thought it was a challenging paper, the wordings were???
16. (Original post by meimaths123)
Didnt it say the probability of not losing? doesnt that mean he can draw or win so wouldnt it be 1-(0.2^3) which was like 0.9 something
No, since your method only works out the probability that they don't lose all 3 matches. You missed out the chance they could lose 1 or 2 matches
17. So when people did the quartile a for q1 what did you get, everyone seems to have a different answer?
18. (Original post by bob6969)

1i) IQR = 4 (or 4.15 depending on method) Median = 29
ii) No outliers

2i) 0.512
ii) 0.16
iii) 0.66 i think

3i) 120
ii) 1/60
iii) 1/60
iv) 0.1

4i) 50k = 60 so k is 1.2
ii) E(X) = 2.74 Var(X) = 1.232

5i) 0.21
ii) venn diagram
iii) 0.241

6i) mean = 70.19 s.d. = 36.90
ii) 15.7%
iii) histogram drawing
iv) positive skew
v) 20.2%

7ai) 0.1423
B) 0.2108
C) 1.6
ii) p=0.1 h1, p<0.1
iii) Not writing it out
iv) don't reject as 5.3% > 5% so insufficient evidence
Isn't 7c)iv) significant because it's less than 10%?
19. (Original post by meimaths123)
Didnt it say the probability of not losing? doesnt that mean he can draw or win so wouldnt it be 1-(0.2^3) which was like 0.9 something
That's the probability of him losing all 3 games, you needed to minus the probability of losing just one game and two games and the various combinations
20. (Original post by robnaldom9)
Isn't 7c)iv) significant because it's less than 10%?
I think the significance level was 5%

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