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Edexcel S2 - 27th June 2016 AM Watch

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    (Original post by Jellymath)
    What is the answer to E(A)? I got 151pi/3 using the formula in the formula book
    Got that too
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    What did you all get for the value of n in that big 8 marker normal distribution question?

    I got like 124…

    Apart from that, good paper.
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    (Original post by thephysio)
    What did you all get for the value of n in that big 8 marker normal distribution question?

    I got like 124…

    Apart from that, good paper.
    225


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    About 67/75 for me....

    Arithmetic slip in 8 marker drop around 3, ****ed up the last part of the last question = 2 gone, therefore 5 marks dropped that I know of


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    My answers, idk if they are right

    Q1,
    Mean= 1.41
    Variance= 1.4419
    Probabilities; 0.7769, 0.1378, 0.1516

    Q2,
    N=60
    0.0133
    0.0159
    Do not reject Ho (using binomial tables)

    Q3,
    0.75
    151π/3

    Q4,
    K=1/9

    Q5,
    N=225

    Q6,
    P(M=5)= 0.3
    P(M=6)= 0.29
    P(M=7)= 0.12

    N=11

    Q7,

    Mean= 1.2
    Var= 1.92
    P(X>3)= 0.3250
    £41.88 per bin

    He shouldn't as the mean profit of bins would be £40
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    Got k wrong so that's 4 gone. Hoping everything else was right.
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    K = 1/9
    N=225
    Mean was 1.41
    Variance 1.44
    E(a) was 131pi/5
    41.88 pounds then 40 pounds so he shouldn't remove staples
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    i got 225!!!

    FLIP yeah!!! last exam forever!!!!!

    FREEEEEEDOMMMM!:p:)
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    Answers on my calc stored (not in order)

    151/3 pi
    0.1516
    0.2396 for hypothesis
    1/9
    225
    0.24
    0.325 for last question part B
    N = 57




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    225 as well
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    Did you have to do continuity correction for the normal distribution question? I put in 55.5 and got a nice answer of 225, I then tried with just 55 and got not such a nice answer....
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    (Original post by Nikhilm)
    Answers on my calc stored (not in order)

    151/3 pi
    0.1516
    0.2396 for hypothesis
    1/9
    225
    0.24
    0.325 for last question part B
    N = 57




    Posted from TSR Mobile
    Yep
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    (Original post by Yua)
    K = 1/9
    N=225
    Mean was 1.41
    Variance 1.44
    E(a) was 131pi/5
    41.88 pounds then 40 pounds so he shouldn't remove staples
    How did you get 41.88?
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    LOOOOOL.
    I just need U+ for an A or A* in maths, and this exam I f***ked it up. Well, I think I got a C or B, which is enough to get an A or A* in maths 😂😂😂😂
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    0.24 for variance on q7?
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    (Original post by Mattematics)
    What did people put for the last question? My expected was £41 something and he'd get £40 removing so I said no.
    same here!!
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    (Original post by Yua)
    0.24 for variance on q7?
    Yep
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    Question 1a) U = 1.44 Var(x) = 1.44 (3 Marks)b) U was approximately Variance (1 Mark)c) I – 0.251 II – 0.777 (4 Marks)d) 0.1378 (3 Marks)e) 0.152 (3 Marks) (Might be 0.132 – Rushed this onmy copy of answers) Question 2a) N=60 (2 Marks)b) I – 0.0133 II -0.0159 (5 Marks)c) 0.2396>0.01 Keep H0 (5 Marks)Question 3a) f(x) = ¼ 5=<R=<9 , 0 otherwise (1 Marks)b) 0.5 (1 Marks)c) 158.13 (4 Marks)Question 4a) Show that (6 Marks)b) K = 1/9 (4 Marks)Question 5 N = 225(I applied continuity correction – I honestly didn’t know if I should) (8Marks)Question 6a) 9 samples (2 Marks)b) 4 = ¼ , 5 = 3/10 , 6= 29/100 , 7 = 3/25, 8 =1/25 (5 Marks)c) N=57 (3 Marks)Question 7a) 1.2 (4 Marks)b) 0.24 (4 Marks)c) 0.325 (3 Marks)d) £41.88 (2 Marks)e) Shouldn’t remove staples (2 Marks) I’m not claiming these are all right – let me know J These are what I wrote
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    (Original post by Yua)
    0.24 for variance on q7?
    Yep got that
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    (Original post by Supermanxxxxxx)
    Yeah same my probability was so high like 0.2 or something like that
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    Yeah same but i did it like four times so hopefully its correct

    (Original post by Nikhilm)
    N= 57, n= 225, E(A) = 151/3 pi

    Agree?
    Posted from TSR Mobile
    Yeah i got that too yaaaay
 
 
 
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