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Edexcel S2 - 27th June 2016 AM Watch

  • View Poll Results: How did you find the Edexcel S2 exam?
    Very hard
    145
    14.71%
    Hard
    331
    33.57%
    Normal
    293
    29.72%
    Easy
    152
    15.42%
    Very easy
    65
    6.59%

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    Is there an unofficial mark scheme?
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    (Original post by keres)
    Anyone up for doing an unofficial mark scheme?
    It would be difficult since many people can't remember answers like 0.8337 ect haha - I'm just hoping that physics and maths tutor would've got hold of the paper and the model answers will be uploaded soon !
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    (Original post by imran_)
    c1: 90
    c2: 86
    s1: 70

    c3: 74
    c4:78
    s2: 55 marks ( maybe a B?)

    lol there goes my A
    Im the exact same, bye bye uni


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    Would I get any marks for this?! Question 5) Normal approx...X~B(n,0.2)E(X)=0.2nVar( X)=0.16ntherefore; X~N(0.2n,0.16n) P(X>55)=> CC P(X>=55.5)P(Z>(55.5-0.2n)/rt0.16n)=0.04011-P(Z<(55.5-0.2n)/rt0.16n)=0.0401P(Z<(55.5-0.2n)/rt0.16n)=0.9599Therefore;(55.5-0.2n)/rt0.16n = 1.7555-0.2n= 1.75(0.4)(n^1/2)55-0.2n=0.7n^1/2Then I squares out formed a quadratic and tried to rearrange but it didn't solve (yielded imaginary numbers) How many marks out of 8 would I get if any? Was I on the right lines or have I lost the plot.
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    (Original post by keres)
    Anyone up for doing an unofficial mark scheme?
    I will if someone gets me the paper.
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    (Original post by Supermanxxxxxx)
    Im the exact same, bye bye uni


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    my firm wanted ABB, so im not too fussed with a B in maths but could've done better
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    (Original post by imran_)
    my firm wanted ABB, so im not too fussed with a B in maths but could've done better
    I need aaa so literally just screwed my plans for dentistry


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    (Original post by cjlh)
    Lol of all the things to slip up on I got the variance in the first question wrong. All right other that that it looks like, beaming.
    hahah same I couldn't for the life of me remember how you would work it out.. I ended up with an answer of -19600 look
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    (Original post by imran_)
    my firm wanted ABB, so im not too fussed with a B in maths but could've done better
    When you're actually at uni I'm sure you'll feel better
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    (Original post by Supermanxxxxxx)
    I need aaa so literally just screwed my plans for dentistry


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    ahhhh I hope you still get it - I'm sure the boundaries will go down a bit !
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    Is the median of a quadratic pdf = the interval/2 ?
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    Can someone explain why you use 55.5 as a correction rather than 54.5?
    Think I ended up getting 221 students so how many marks would i lose if thats the only mistake?
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    (Original post by fefssdf)
    Twitter was sending lots of hate towards Peter so hopefully that counts in our favour .

    My profile pic is a page of chapter 2 from c3
    Poor Peter lol

    Ah okay!
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    For the Normal Distribution question, I forgot to change 55 to 55.5, how many marks will I lose?
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    I got between 68-71 because I dicked up Q3 by using E(R)^2 instead of E(R^2) and then, after using a continuity correction, did the question again to check my working without the correction, and got 223 ))))) RIP me, there goes the A*
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    (Original post by Armpits)
    This is so depressing, needed to do well in S2 to get an A, probably got a B now, will consider suicide.
    i feel u mate.. I might do the same thing..
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    (Original post by Student403)
    Poor Peter lol

    Ah okay!
    I know ahaha
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    can you integrate pi*R^2 and divide by 4 for the mean area. I got the same answer using this method..
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    (Original post by dnpnstn)
    I got between 68-71 because I dicked up Q3 by using E(R)^2 instead of E(R^2) and then, after using a continuity correction, did the question again to check my working without the correction, and got 223 ))))) RIP me, there goes the A*
    for an a* you need 90ums average across C3 and C4... your grade in S2 has no weight whatsoever towards whether you do/don't get an A*, unless you're concerned about the individual grade of the unit itself ?
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    Anyone who did S2 IAL?
 
 
 
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