You are Here: Home

# S1 May 2012 - Post Exam Thread - Paper and Solutions in the FIRST POST

Maths exam discussion - share revision tips in preparation for GCSE, A Level and other maths exams and discuss how they went afterwards.

Announcements Posted on
1. Re: S1 May 2012 - Post Exam Thread - Paper and Solutions in the FIRST POST
(Original post by Arsey)
Solutions now in the first post
THANK YOU SO MUCH !

MUCH APPRECIATED !

I remember you posted the gcse one last year too! thanks again !
2. Re: S1 May 2012 - Post Exam Thread - Paper and Solutions in the FIRST POST
3. Re: S1 May 2012 - Post Exam Thread - Paper and Solutions in the FIRST POST
I enjoyed the histogram question, you use interpolation for the median right?

Probability caused me problems though.
4. Re: S1 May 2012 - Post Exam Thread - Paper and Solutions in the FIRST POST
(Original post by Arsey)
Solutions now in the first post
Any idea of the boundaries?
5. Re: S1 May 2012 - Post Exam Thread - Paper and Solutions in the FIRST POST
As I predicted, the only thing wrong for me was the histogram question. And I hope I didn't make any silly errors on other questions.
6. Re: S1 May 2012 - Post Exam Thread - Paper and Solutions in the FIRST POST
I don't think I got any of that histogram question except for maybe the first part. The mean really threw me off! I ended up spending 10 minutes only to find I had counted up 450 again which was the given anyway!
7. Re: S1 May 2012 - Post Exam Thread - Paper and Solutions in the FIRST POST
I thought it went ok, but Statistics is really hit and miss for me. I find I make so many little mistakes, and they aren't as generous with follow through marks as they are on say the Mechanics papers.
8. Re: S1 May 2012 - Post Exam Thread - Paper and Solutions in the FIRST POST
FINALLY, at least one good paper! Thanks arsey
9. Re: S1 May 2012 - Post Exam Thread - Paper and Solutions in the FIRST POST
For the venn diagram question, does it matter if you proved independence by shrinking the sample space so W was excluded, so you only had T, B and t'b' and showed that they still were independent by the same method you used?
10. Re: S1 May 2012 - Post Exam Thread - Paper and Solutions in the FIRST POST
Actually scared to look at the paper :/
11. Re: S1 May 2012 - Post Exam Thread - Paper and Solutions in the FIRST POST
(Original post by Jack74)
Easiest paper I've done in my life apart from maybe Unit 2 Chemistry GCSE , only thing i got wrong i think was drawing the regression line on the graph and the skew of the data i got mixed up. :/
Ahhh the only thing I messed up was plotting the regression line too! So annoyinggg
12. Re: S1 May 2012 - Post Exam Thread - Paper and Solutions in the FIRST POST
Think I got 67. All correct except my histrogram.
13. Re: S1 May 2012 - Post Exam Thread - Paper and Solutions in the FIRST POST
I don't want to look at the answers in case I spot silly mistakes
14. Re: S1 May 2012 - Post Exam Thread - Paper and Solutions in the FIRST POST
****..... xD
15. Re: S1 May 2012 - Post Exam Thread - Paper and Solutions in the FIRST POST
Say i did the pmcc wrong but i sigma xy over the root of sxx x syy would i get a mark or no marks at all?

and for 5.e. if i wrote median because it is not effected by extreme value or outliers will i get the mark?
16. Re: S1 May 2012 - Post Exam Thread - Paper and Solutions in the FIRST POST
Actually scared to look at the paper :/
THIS aha, I opened it and looked at the last question, then realised that I can't actually remember quite a few of my answers...
17. Re: S1 May 2012 - Post Exam Thread - Paper and Solutions in the FIRST POST
Ahh crap, I made a mistake and concluded that P(B) and P(T) were independent. Oh well, at least I should get the rest of the marks. Any predictions for the grade boundaries? And if I put that there is positive linear correlation and that as p increases so does t, is that enough to get the marks for why a linear regression model would be suitable?
Last edited by und; 19-05-2012 at 01:15.
18. Re: S1 May 2012 - Post Exam Thread - Paper and Solutions in the FIRST POST
Had a total mindblank on the histogram. Didn't even think to count the mother-fudging squares Too scared to look at the rest - the fact that I'm guaranteed to have dropped at least 10 marks just from that makes me too fearful of how I'll feel if I've dropped a lot of others :/
19. Re: S1 May 2012 - Post Exam Thread - Paper and Solutions in the FIRST POST
Well I got 61/75, to say I was convinced stats would ruin my life, not bad, haha
20. Re: S1 May 2012 - Post Exam Thread - Paper and Solutions in the FIRST POST
Hey two questions, if anyone can answer i'd appreciate it a lot:

1. For question 4a i gave two examples which were (B n W) and (T n W) . Each one is correct but would i be marked down for giving two? i got the explanation correct btw...

2. For question 5e would i get away by saying that the data is almost symmetrical and therefore it would be appropriate to use the mean? Also for question 5d i said the distribution was symmetrical for the same reasons above, again would i get the marks?

Thank you
Last edited by koolkid1011; 19-05-2012 at 01:17.

## Step 2: Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank

this is what you'll be called on TSR

2. this can't be left blank

never shared and never spammed

3. this can't be left blank

6 characters or longer with both numbers and letters is safer

4. this can't be left empty
1. By completing the slider below you agree to The Student Room's terms & conditions and site rules

2. Slide the button to the right to create your account

You don't slide that way? No problem.

Last updated: May 18, 2013
Useful resources

## Articles:

Study Help rules and posting guidelinesStudy Help Member of the Month nominations

## Groups associated with this forum:

View associated groups
Study resources