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Arsey's S1 Edexcel Summer 2013 Model Solutions BOTH PAPERS

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    Decent paper, every question had been asked before, nothing sneaky or too hard at all.




    1. Correlation and regression - pretty easy but took a long time. Part e) will be poorly answered.


    2. Box plots - very easy


    3. Probability - pretty easy


    4. Mean, sd, median, coding - all pretty simple


    5. drv - I thought this was easy but I can see it causing problems


    6. Normal distribution - standard.




    Quite a bit easier than Jan, but S1 boundaries are generally low as a higher prortion of weaker candidates take S1. The highest summer boundary in the last 10 years was 61.


    I am going for 62 for an A.




    This summer I will upload solutions to the following Edexcel papers:

    Core 1;
    Core 2;
    Core 3;
    Core 4;
    FP1;
    M1;
    M2;
    S1;
    D1;
    D2.

    I will try to get hold of some solutions for FP2; FP3 and M3.

    I don't do S2

    All papers will be uploaded in line with site rules (please don't PM me asking when I will I be uploading them).


    I have also added the other time zone paper. I thought it was a LOT harder than the UK one.


    Edit - what is with the negative thing, I don't have to upload these solutions
    :confused:

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    Attached Files
  1. File Type: pdf 13 May S1 Int model.pdf (750.3 KB, 7550 views)
  2. File Type: pdf 13 May S1 Model red.pdf (763.2 KB, 30494 views)
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    yesss good luck to all that did this paper!
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    Good luck to all going through it going to check my answers now..

    Edit: Judging from this, got between 68-70 marks, dependent on method marks. Pretty happy with that, almost the same as my C1 mark (just a bit lower)
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    Is it me or should the outlier be on 14?
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    I may be misunderstanding but on the boxplot it looks like you put 24 for an outlier rather than 14
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    confused ! - for the box plot you say 14 is an outlier which i agree with , bit youve drawn the outlier above 20 ?
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    WOW yes 14 is an outlier and I though he said that 58.1 would be an A ?????
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    Arsey=Legend
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    Thanks again Arsey!
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    (Original post by Arsey)
    Decent paper, every question had been asked before, nothing sneaky or too hard at all.




    1. Correlation and regression - pretty easy but took a long time. Part e) will be poorly answered.


    2. Box plots - very easy


    3. Probability - pretty easy


    4. Mean, sd, median, coding - all pretty simple


    5. drv - I thought this was easy but I can see it causing problems


    6. Normal distribution - standard.




    Quite a bit easier than Jan, but S1 boundaries are generally low as a higher prortion of weaker candidates take S1. The highest summer boundary in the last 10 years was 61.


    I am going for 62 for an A.
    a few initial questions

    regression part a) forgot to give to 3sf and gave as exact, drop 1 mark?

    probability part d) venn diagram if I left the middle of the bus as blank rather than 0, lose any marks?

    regression part c) If I said data is close together so a regression line would be suitable is this correct?

    Normal dist part c) If I drew a diagram of the initial probability how many marks, I couldn't figure out how to progress because my mind wasn't straight
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    (Original post by Arsey)
    Decent paper, every question had been asked before, nothing sneaky or too hard at all.




    1. Correlation and regression - pretty easy but took a long time. Part e) will be poorly answered.


    2. Box plots - very easy


    3. Probability - pretty easy


    4. Mean, sd, median, coding - all pretty simple


    5. drv - I thought this was easy but I can see it causing problems


    6. Normal distribution - standard.




    Quite a bit easier than Jan, but S1 boundaries are generally low as a higher prortion of weaker candidates take S1. The highest summer boundary in the last 10 years was 61.


    I am going for 62 for an A.
    For 4e isn't data negatively skewed since Q3 - Q2 < Q2 - Q1?
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    Damn! Completely missed the giving answer to 3sf but got values right, how many marks would I lose? In question 1
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    Thanks Arsey
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    and for part B of normal dist it wanted percentage, so 2.74% but brilliant thank you!
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    61 - 62 I would say I got , hopefully an A !!
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    Oh my god.

    I think I only dropped 1 mark.

    I....oh my god....I....I....I....in stats...*dies*


    This was posted from The Student Room's iPhone/iPad App
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    would i get ecf marks if i get the regression equation wrong but everything else right??? please answer
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    Thank you so much! I stayed up for this. I literally stayed up for this. My life is pretty depressing.
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    (Original post by Arsey)
    Decent paper, every question had been asked before, nothing sneaky or too hard at all.




    1. Correlation and regression - pretty easy but took a long time. Part e) will be poorly answered.


    2. Box plots - very easy


    3. Probability - pretty easy


    4. Mean, sd, median, coding - all pretty simple


    5. drv - I thought this was easy but I can see it causing problems


    6. Normal distribution - standard.




    Quite a bit easier than Jan, but S1 boundaries are generally low as a higher prortion of weaker candidates take S1. The highest summer boundary in the last 10 years was 61.


    I am going for 62 for an A.




    This summer I will upload solutions to the following Edexcel papers:

    Core 1;
    Core 2;
    Core 3;
    Core 4;
    FP1;
    M1;
    M2;
    S1;
    D1;
    D2.

    I will try to get hold of some solutions for FP2; FP3 and M3.

    I don't do S2

    All papers will be uploaded in line with site rules (please don't PM me asking when I will I be uploading them).



    for the venn diagram question i put three circles, the first being full time, second being bus and third being contract. Therefore the area that full time and contract doesnt intersect bus, its part-time that gets the bus, and the bit outside the circles is part-time which doesnt get the bus.
    Surely this is more right than having a centre circle of 0?
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    For the last question, I remember getting an answer of 4.85 for the s.d because i foolishly converted 98% into it's value from the table and saying that it was equal to P(W<210) - P(W<200), do you (anyone who reads this) believe i could get a couple of method marks from this?
Updated: December 2, 2013
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