CCEA S1 Mathematics - 30th May 2014 Watch

Poll: How difficult did you find the exam?
Chuck Norris (0)
0%
Challenging (3)
33.33%
Meh (3)
33.33%
Pretty Easy (3)
33.33%
Derp (0)
0%
GingerCodeMan
Badges: 2
Rep:
?
#1
Report Thread starter 4 years ago
#1
Hi everyone. Please feel free to post any thoughts/queries/notes/worries before and after the exam.

If you feel like it, you can post your solutions so we can all compare answers

I have attached my unofficial mark scheme.
0
reply
Mr Tall
Badges: 9
Rep:
?
#2
Report 4 years ago
#2
**** paper, read the last question wrong **** MY LIFE
0
reply
Mr Tall
Badges: 9
Rep:
?
#3
Report 4 years ago
#3
i didnt read the last question where it said "red is replaced and an additional one added" I did the whole question but didn't take into account that red was added and replaced.....

will I get zero for part i) ii) ans iii) in that case? I drew a tree diagram (correct) i think, for both colours not being replaced and got 1/5 as the probablilty that a white is picked
0
reply
stephen_mcgarry
Badges: 0
Rep:
?
#4
Report 4 years ago
#4
Do you want me to post the paper up? I have it here
0
reply
Mr Tall
Badges: 9
Rep:
?
#5
Report 4 years ago
#5
(Original post by stephen_mcgarry)
Do you want me to post the paper up? I have it here
yes mate! itd be great if someone could d a markscheme too :P
0
reply
Mr Tall
Badges: 9
Rep:
?
#6
Report 4 years ago
#6
what did you get for the mean and standard deviation for normal dist question?
0
reply
stephen_mcgarry
Badges: 0
Rep:
?
#7
Report 4 years ago
#7
(Original post by Mr Tall)
what did you get for the mean and standard deviation for normal dist question?
Mean = 48.1
Standard deviation = 14.1

Posted from TSR Mobile
0
reply
stephen_mcgarry
Badges: 0
Rep:
?
#8
Report 4 years ago
#8
OK guys here's the full paper


Posted from TSR Mobile
Attached files
0
reply
stephen_mcgarry
Badges: 0
Rep:
?
#9
Report 4 years ago
#9
(Original post by Mr Tall)
i didnt read the last question where it said "red is replaced and an additional one added" I did the whole question but didn't take into account that red was added and replaced.....

will I get zero for part i) ii) ans iii) in that case? I drew a tree diagram (correct) i think, for both colours not being replaced and got 1/5 as the probablilty that a white is picked
Slightly annoyed about the last one as well, didn't get the last part as I ran out of time I think part ii) was too long, a lot to work out

Posted from TSR Mobile
0
reply
TheBigBoy
Badges: 0
Rep:
?
#10
Report 4 years ago
#10
1) (i) a=14
(ii) standard deviation= 5.099

2) (i) 0.434
(ii) 0.812
(iii) 0.0355

3) (i) lamda=3
(ii) 0.577

4)(i) k=3
(ii) Var(X)= 0.0375
(iii) 0.512

5) (i) 6/7
(ii) a b and c all No

6)(i) distribution table
(ii) 5
(iii) 2.5

7) mean=48.1 s.d=14.2

8)(i) 0.3
(ii) 0.929
(iii) 5/19
0
reply
stephen_mcgarry
Badges: 0
Rep:
?
#11
Report 4 years ago
#11
OK here is all of my answers, I need to redo Q8, but I'll add it shortly

1)i) a=14
ii) sqrt26 = 5.10 (3sf)

2)i)a) 0.434
i)b) 0.812
ii) 0.0356

3)i) Guessed - E(X) = variance
Hence E(X) = (standard deviation)^2
ii) 0.577

4)i) k=3
ii) 0.0371
iii) 0.512

5)i) P(AUB) = 6/7
ii)a) A and B not mutually exclusive as P(AnB) is not equal to 0
ii)b) A and B are exhaustive and P(A) + P(B) = 1 (friends answer)
Or, A and B are not exhaustive as P(PUB) is not equal to 1 (my answer)
Unsure which is correct
ii)c) A and B not independent as P(AnB) is not equal to P(A) x P(B)

6)i) x | 2 | 3 | 4 | 5 | 6 | 7 | 8
P(X=x) | 1/16 | 1/8 | 3/16 | 1/4 | 3/16 | 1/8 | 1/16
Done respectively
ii) E(X)=5
Table is symmetrical, and the centre value of x is 5
iii) Var(X) = 2.5

7) Mean = 48.1
Standard deviation = 14.1

8)i) 3/10 = 0.3
ii) 13/14 = 0.929
iii) 5/19 = 0.263

Posted from TSR Mobile
0
reply
stephen_mcgarry
Badges: 0
Rep:
?
#12
Report 4 years ago
#12
(Original post by TheBigBoy)
1) (i) a=14
(ii) standard deviation= 5.099

2) (i) 0.434
(ii) 0.812
(iii) 0.0355

3) (i) lamda=3
(ii) 0.577

4)(i) k=3
(ii) Var(X)= 0.0375
(iii) 0.512

5) (i) 6/7
(ii) a b and c all No

6)(i) distribution table
(ii) 5
(iii) 2.5

7) mean=48.1 s.d=14.2

8)(i) 0.3
(ii) 0.929
(iii) 5/19
For 5)ii) I put all no, but friends said that Exhaustive is yes as P(A) + P(B) = 1
Is this correct?

Posted from TSR Mobile
0
reply
TheBigBoy
Badges: 0
Rep:
?
#13
Report 4 years ago
#13
(Original post by stephen_mcgarry)
For 5)ii) I put all no, but friends said that Exhaustive is yes as P(A) + P(B) = 1
Is this correct?

Posted from TSR Mobile
I have no idea. Guessed them all very quickly cos they were only worth a mark each
0
reply
stephen_mcgarry
Badges: 0
Rep:
?
#14
Report 4 years ago
#14
(Original post by TheBigBoy)
I have no idea. Guessed them all very quickly cos they were only worth a mark each
Oh that's OK, you don't know what exhaustive means do you? I thought it was P(AUB) = 1

Posted from TSR Mobile
0
reply
TheBigBoy
Badges: 0
Rep:
?
#15
Report 4 years ago
#15
(Original post by stephen_mcgarry)
Oh that's OK, you don't know what exhaustive means do you? I thought it was P(AUB) = 1

Posted from TSR Mobile
Think i got about 68-70 in this paper which should hopefully make up for how horrendously horrific i did in C3
0
reply
stephen_mcgarry
Badges: 0
Rep:
?
#16
Report 4 years ago
#16
(Original post by TheBigBoy)
Think i got about 68-70 in this paper which should hopefully make up for how horrendously horrific i did in C3
Yeah I hope to have around that as well! I thought C3 went well hopefully
What did you make of C4?

Posted from TSR Mobile
0
reply
TheBigBoy
Badges: 0
Rep:
?
#17
Report 4 years ago
#17
(Original post by stephen_mcgarry)
Yeah I hope to have around that as well! I thought C3 went well hopefully
What did you make of C4?

Posted from TSR Mobile
Easier than C3 but still hard. Hoping to have got mid Bs in those two and now a very high A in S1 which should hopefully even out at a high B/ low A
0
reply
ellipsis909
Badges: 0
Rep:
?
#18
Report 4 years ago
#18
mark scheme anyone?
0
reply
stephen_mcgarry
Badges: 0
Rep:
?
#19
Report 4 years ago
#19
(Original post by TheBigBoy)
Easier than C3 but still hard. Hoping to have got mid Bs in those two and now a very high A in S1 which should hopefully even out at a high B/ low A
I think they both went relatively well, I went in hoping to attain my B overall, I feel like they went well enough to average 90% between them, so really hoping for an A* ooh such a wait till August though

Posted from TSR Mobile
0
reply
onedirection
Badges: 0
Rep:
?
#20
Report 4 years ago
#20
can someone please put up a mark scheme
0
reply
X

Quick Reply

Attached files
Write a reply...
Reply
new posts
Latest
My Feed

See more of what you like on
The Student Room

You can personalise what you see on TSR. Tell us a little about yourself to get started.

Personalise

University open days

  • University of East Anglia
    All Departments Open 13:00-17:00. Find out more about our diverse range of subject areas and career progression in the Arts & Humanities, Social Sciences, Medicine & Health Sciences, and the Sciences. Postgraduate
    Wed, 30 Jan '19
  • Solent University
    Careers in maritime Undergraduate
    Sat, 2 Feb '19
  • Sheffield Hallam University
    City and Collegiate Campus Undergraduate
    Sun, 3 Feb '19

Brexit: Given the chance now, would you vote leave or remain?

Remain (552)
80.58%
Leave (133)
19.42%

Watched Threads

View All