You are Here: Home >< Maths

# S2 IAL June 2016 Edexcel Model Answers kprime2

Announcements Posted on
TSR's new app is coming! Sign up here to try it first >> 17-10-2016
1. IAL S2 solutions attached. The UK paper was harder.
Attached Images
2. S2 IAL S16 Kprime2.pdf (964.9 KB, 115 views)
3. (Original post by kprime2)
IAL S2 solutions attached. The UK paper was harder.
why is that wrong in the first part of the first question?
Attached Images

4. (Original post by kprime2)
IAL S2 solutions attached. The UK paper was harder.
PRSOM - Thank you very much for this.

Just a few things:

In 1(a), it said "fewer than", so shouldn't the inequality be strict? i.e. ?

In 1(d), perhaps there's been a calculation error in the continuity correction - .

In 4(f) shouldn't the numerator be 25?

Do you reckon I'd lose the marks in 3(c) if I just said "the test is significant" and made similar comments in following marks?

I reckon I should get 72 minimum on this then. I see no error in any of the maths on my part, could lose marks here and there for commentary.
5. (Original post by Ayman!)
PRSOM - Thank you very much for this.

Just a few things:

In 1(a), it said "fewer than", so shouldn't the inequality be strict? i.e. ?

In 1(d), perhaps there's been a calculation error in the continuity correction - .

In 4(f) shouldn't the numerator be 25?

Do you reckon I'd lose the marks in 3(c) if I just said "the test is significant" and made similar comments in following marks?

I reckon I should get 72 minimum on this then. I see no error in any of the maths on my part, could lose marks here and there for commentary.
In question 2 (ii) i found P(X=7) and then wrote down P(X=3) = 16 * P(X=7) but from some silly reason I then forgot the 16 and solved the equation P(X=3) = P(X=7) and ended up with p = 1/2 . Is there a chance i could get 2 marks from that part?
6. (Original post by AlexFrangos)
In question 2 (ii) i found P(X=7) and then wrote down P(X=3) = 16 * P(X=7) but from some silly reason I then forgot the 16 and solved the equation P(X=3) = P(X=7) and ended up with p = 1/2 . Is there a chance i could get 2 marks from that part?
I'd say you have 2 because your initial method was correct.
7. (Original post by Ayman!)
I'd say you have 2 because your initial method was correct.
Thank you !! Also in question 6a I read that the mean was 1 and not mode. But the mode happens to be equal to the mean and so my final answer was correct. Will i lose marks there?
8. (Original post by Ayman!)
PRSOM - Thank you very much for this.

Just a few things:

In 1(a), it said "fewer than", so shouldn't the inequality be strict? i.e. ?

In 1(d), perhaps there's been a calculation error in the continuity correction - .

In 4(f) shouldn't the numerator be 25?

Do you reckon I'd lose the marks in 3(c) if I just said "the test is significant" and made similar comments in following marks?

I reckon I should get 72 minimum on this then. I see no error in any of the maths on my part, could lose marks here and there for commentary.
Yes you're absolutely right. Apologies, I did rush this paper. I have updated the solutions

I think you may get the mark in 3c. The mark scheme will probably have a list of few things you could put down.
9. (Original post by AlexFrangos)
Thank you !! Also in question 6a I read that the mean was 1 and not mode. But the mode happens to be equal to the mean and so my final answer was correct. Will i lose marks there?
If you integrated xf(x) then I imagine you could possibly lose a method mark
10. (Original post by Ayman!)
If you integrated xf(x) then I imagine you could possibly lose a method mark
Why would I lose a method mark?
11. (Original post by kprime2)
Yes you're absolutely right. Apologies, I did rush this paper. I have updated the solutions

I think you may get the mark in 3c. The mark scheme will probably have a list of few things you could put down.
No really, thank you for doing this - was looking more forward to S2 than FP3 solutions for some odd reason.

It's really my fault for not writing a more detailed response. I finished with ample time remaining and could have gone back to write more, but i spent the rest of the time worrying about FP3… If I miss 100 in S2 I'll be a complete idiot for doing so.
(Original post by AlexFrangos)
Why would I lose a method mark?
Because they said the mode was 1, not the mean. If the function was skewed, then your assumption wouldn't work. It all depends on how they set the mark scheme tbh.
12. (Original post by kprime2)
IAL S2 solutions attached. The UK paper was harder.
Do you actually think the UK paper was harder? For me, I sat the UK paper and found it trivial. This IAL paper looks easy too, however more mistake prone, opinion? Also do you reckon 70/75 on the UK paper which I got should be an A*?

Posted from TSR Mobile
13. (Original post by iMacJack)
Do you actually think the UK paper was harder? For me, I sat the UK paper and found it trivial. This IAL paper looks easy too, however more mistake prone, opinion? Also do you reckon 70/75 on the UK paper which I got should be an A*?

Posted from TSR Mobile
I don't think the UK paper was hard, just harder than the IAL. You can't really judge difficulty just by looking at the paper. I'd imagine a lot would have struggled with some few parts of the uk S2. You have to realise the average TSR student is much smarter than your average joe.
14. (Original post by iMacJack)
Do you actually think the UK paper was harder? For me, I sat the UK paper and found it trivial. This IAL paper looks easy too, however more mistake prone, opinion? Also do you reckon 70/75 on the UK paper which I got should be an A*?

Posted from TSR Mobile
Idk i thought uk was harder because it was wordier, but a few friends of mine disagree. It's all subjective.

I think that should just be 90 UMS or 88 at worst.
15. (Original post by Ayman!)
Idk i thought uk was harder because it was wordier, but a few friends of mine disagree. It's all subjective.

I think that should just be 90 UMS or 88 at worst.
Yeah - I mean I feel like from looking at the IAL paper that I'd of done worse on that.. but who knows

Posted from TSR Mobile

## 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: July 1, 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