You are Here: Home >< Maths

# S1 June 2016 UK Model Answers (Edexcel)

Announcements Posted on
Last day to win £100 of Amazon vouchers - don't miss out! Take our quick survey to enter 24-10-2016
1. Soz for the delay. Got caught up with the Euro games

I thought this was quite tricky

EDIT: 5(e) I didn't realise it said use answer to part d too. In part d P(W<3) = 0.2546 whereas the actual P(W<3)=0.18. My comment would be that this just further consolidates that the normal model is not really accurate. Also, I don't think saying the decision to use the normal model on the basis that the median and median are close will be accepted. While the median and mean are close, the data is not nearly symmetrical, if it were part d P(W<3) would have yielded a more accurate approximation.
2. Awesome, thank you for uploading this! It'll put a lot of minds at ease
3. (Original post by kprime2)
Soz for the delay. Got caught up with the Euro games

I thought this was quite tricky
You beautiful beautiful person.

(Now do M4!)
4. Thanks so much for this. Few questions:

1) Would rounding and hence giving E(X) to 3sf lose any marks? (you gave the full answer with decimals)

2) For 3e, what do you thin of the argument that the new x point and y point was significantly above the mean for x and y respectively and thus lay far away from the 'line of best fit' created by the PMCC. This means that the PMMC falls. 2 marks?

3) For 3-d-ii, I made a silly slip and forgot to take into account 0.15 for my denominator (and so got 15/22 rather than 15/37). Because of this, I also got the wrong answer for part e (although my method was correct, identical to yours). How many marks do you reckon I would lose for both of these errors?

4) For 4d, I again made a silly sign slip, meaning I forgot to do '1 minus'. My final answer was 0.745. 1 or 2 marks lost?

I understand if you can't answer all of the above but I would really appreciate it if you could. Thanks again for doing the solutions.
5. (Original post by ombtom)
You beautiful beautiful person.

(Now do M4!)
M4 is beyond me x_x
6. I can do M4 if I have the access to questions.

(Original post by ombtom)
You beautiful beautiful person.

(Now do M4!)
7. Thank you!

Posted from TSR Mobile
8. Do u know how to get IAL S1s model answers?
9. (Original post by kprime2)
Soz for the delay. Got caught up with the Euro games

I thought this was quite tricky
I got 61 marks i think, does anyone know if this is a B or a C?
10. (Original post by leestitt)
I got 61 marks i think, does anyone know if this is a B or a C?
More likely to be an A.
11. (Original post by LukeB98)
More likely to be an A.
Oh really?!
12. for question 6b i got my z value as just -0.84 so it is basically rounded , would i still get full marks as my T value came out as 206.4 it should fit the range the mark scheme has?
13. (Original post by kprime2)
Soz for the delay. Got caught up with the Euro games

I thought this was quite tricky
for question 6b i got my z value as just -0.84 so it is basically rounded , would i still get full marks as my T value came out as 206.4 it should fit the range the mark scheme has?
14. (Original post by TonyDaniels357)
for question 6b i got my z value as just -0.84 so it is basically rounded , would i still get full marks as my T value came out as 206.4 it should fit the range the mark scheme has?
Mark scheme will probably say AWRT to 206.

*AWRT - answers which round to
15. (Original post by TheRandomGenius)
Thanks so much for this. Few questions:

1) Would rounding and hence giving E(X) to 3sf lose any marks? (you gave the full answer with decimals)

2) For 3e, what do you thin of the argument that the new x point and y point was significantly above the mean for x and y respectively and thus lay far away from the 'line of best fit' created by the PMCC. This means that the PMMC falls. 2 marks?

3) For 3-d-ii, I made a silly slip and forgot to take into account 0.15 for my denominator (and so got 15/22 rather than 15/37). Because of this, I also got the wrong answer for part e (although my method was correct, identical to yours). How many marks do you reckon I would lose for both of these errors?

4) For 4d, I again made a silly sign slip, meaning I forgot to do '1 minus'. My final answer was 0.745. 1 or 2 marks lost?

I understand if you can't answer all of the above but I would really appreciate it if you could. Thanks again for doing the solutions.
Nah

No. Sxy was negative and it now increases, and Sxx and Syy becomes bigger. Therefore the correlation is 'less negative' ie increases

No idea

No idea
16. (Original post by kprime2)
Mark scheme will probably say AWRT to 206.

*AWRT - answers which round to
Ohh thats what AWRT means thanks thats likely then should have got 60 marks that should definitely be an A on this paper? thanks for mark scheme
17. (Original post by TonyDaniels357)
Ohh thats what AWRT means thanks thats likely then should have got 60 marks that should definitely be an A on this paper? thanks for mark scheme
60 will be at least an A
18. Actually looks like an interesting S1 paper.
19. (Original post by Ayman!)
Actually looks like an interesting S1 paper.
Looks actually tougher compared to the one we gave in January.
20. THANKS for this.

## Register

Thanks for posting! You just need to create an account in order to submit the post
1. this can't be left blank
2. this can't be left blank
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. Oops, you need to agree to our Ts&Cs to register

Updated: August 17, 2016
TSR Support Team

We have a brilliant team of more than 60 Support Team members looking after discussions on The Student Room, helping to make it a fun, safe and useful place to hang out.

This forum is supported by:
Today on TSR

### How does exam reform affect you?

From GCSE to A level, it's all changing

Poll
Useful resources