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

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Original post by josephpryor
Can someone please confirm the LQ UQ?

Uq 7.68
Lq 3.68
the s1 paper today crushed my soul:frown:
Original post by bob6969
YOUR BOI BOB6969 (hopefully correct) answers

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%
vi) men shoes had smaller mean and lower spread

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?
Don't think that's right, i got one in 30's one in late 20's
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.
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
That's the probability the team lost all three games, which is different than a team not winning all three games
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?
Reply 408
Avatar for rzs
rzs
5
imgur. com/a/4iRS3
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
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
Low or high grade boundaries?
Reply 412
Avatar for ZennyX
ZennyX
2
Original post by Hiba.A
I got 0.66 for 2 (iii)


SAME!
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
Original post by reoshinwho
Low or high grade boundaries?


I thought it was a challenging paper, the wordings were???
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
So when people did the quartile a for q1 what did you get, everyone seems to have a different answer?
Original post by bob6969
YOUR BOI BOB6969 (hopefully correct) answers

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%
vi) men shoes had smaller mean and lower spread

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%?
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
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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