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S2 Edexcel Thursday 24th May AM - PAPER & SOLUTIONS IN FIRST POST

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Reply 600

Gibbo81

Original post by semi-skimmed

I think you might. I just realised i didn't too. :/ But i think it may only be a mark

Original post by jukebox123

Hey gibbo, will I lose any marks for forgetting to highlight the region on the pdf graph where y equals 0?

Turns out you're ok. You usually lose a mark on the Uniform for not doing y=0 but with pdf it should be ok

Reply 601

semi-skimmed

Original post by tangkykiet

NO no i use poisson for question a and b but i use binomial for the third one . Anuwaus , i think i have the anwser which is 2

Erm tbh i dunno. Looking at the markschemes some of them don't giv leeway. Cross fingers i suppose :biggrin:

Reply 602

AS01

what do you guys think grade boundaries gonna be?

Reply 603

Gibbo81

Original post by knowledgecorruptz

Hmmmmm...can't think of anything that could be wrong with it...I mean, it's mathematically true and accurate. Don't think it should be an issue...would like some reassurance, though, haha :smile:

Original post by master_blaster66

alot of people must have done that..i was one of them too lol

Original post by bexlovescandy

I did this too :/ not sure about it.

Had a look through some recent mark schemes and I can't find a similar question. In my opinion I think you will get the marks because you've just defined your hypotheses after the approximation rather than before.

Reply 604

semi-skimmed

Original post by AS01

what do you guys think grade boundaries gonna be?

I don't know because i felt it was just a really weird paper so it's anyone's guess.

Reply 605

Gibbo81

Original post by semi-skimmed

It's alright he's moving to wales anyway so i can say what i like!!!

What a w**ker :angry:

Reply 606

Kenan and Kel

Original post by AS01

what do you guys think grade boundaries gonna be?

100 90 80 70 60 50 40
_75 68 61 54 47 41 35

Reply 607

AS01

Original post by semi-skimmed

I don't know because i felt it was just a really weird paper so it's anyone's guess.

hope its around 64/65

Reply 608

AS01

Original post by Kenan and Kel

100 90 80 70 60 50 40
_75 68 61 54 47 41 35

if 90 is gonna be 68 then I am gonna kill myself coz i got 67. :angry:

Reply 609

Gibbo81

Original post by Arsey

We get used to that in our occupation.

Not sure about the iPad app, not sure how to view smilies or who has quoted me... App boffins please sort it.

This was posted from The Student Room's iPhone/iPad App

This smiley should be called the SB :facepalm:

Reply 610

semi-skimmed

Original post by Gibbo81

What a w**ker :angry:

I know!!! It's alright we've got a classy physics department who help us a lot!!!

Reply 611

Gibbo81

Original post by semi-skimmed

I know!!! It's alright we've got a classy physics department who help us a lot!!!

Yeah, our school's Physics department is AMAZING!!!!!!!!!!! However there's still some losers off to do it at uni #suckers! :wink:

(edited 11 years ago)

Reply 612

exam2k10

Got 16/15 as my constant for the 4<x<10 range for that 8 marker CDF question. Some of my mates also got the same answer. Anyone else got that as their answer as well??

Reply 613

semi-skimmed

Original post by exam2k10

Got 16/15 as my constant for the 4<x<10 range for that 8 marker CDF question. Some of my mates also got the same answer. Anyone else got that as their answer as well??

No sorry. If you go on the first post its the model solutions. Got -2/3

Reply 614

gshock

Original post by Gibbo81

Here are the solutions. Thanks for all the negative rep! I know Arsey is an insomniac but some of us need our beauty sleep!

It comes in two parts unfortunately (I just couldn't get it to less than 1MB).

I thought it was pretty easy with a couple of unusual questions so my best guess for grade boundaries is about 63 for an A.

Let me know what you think.

EDIT the value associated with the crit region in Q2 should be 0.0216 not 0.0215 (doing it in my head!)

People are questioning whether you should use Binomial or Poisson in the last question. Due to the values of n and p mean is not equal to variance and so a Poisson distribution will not give very accurate answers. I am sure that you will gain method marks for this question by using Poisson but the fact is that you may lose a number of accuracy marks.

Yo help me out man i used poisson as the last question will i even get a mark at all ? otherwise im screwed over man goto retake it ?

Reply 615

semi-skimmed

Original post by Gibbo81

Yeah, our school's Physics department is shocking. However there's still some losers off to do it at uni #suckers! :wink:

Wow they must be screwed then if the department sucks! Maybe you should teach it and see if you can do better if they're that bad! #giveitagoson

Reply 616

Gibbo81

Original post by gshock

Yo help me out man i used poisson as the last question will i even get a mark at all ? otherwise im screwed over man goto retake it ?

Yeah you will get 2 or 3 methods for part a and possibly a method for part b so maybe 4 marks.

This was posted from The Student Room's iPhone/iPad App

Reply 617

Gibbo81

Original post by exam2k10

Got 16/15 as my constant for the 4<x<10 range for that 8 marker CDF question. Some of my mates also got the same answer. Anyone else got that as their answer as well??