Hey there! Sign in to join this conversationNew here? Join for free

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%

    Offline

    4
    ReputationRep:
    (Original post by dnpnstn)
    4 marks

    I'd guess one for using E(R) to find E(A), two for finding E(R^2), one for accuracy of the answer
    You get nothing for using E(R) . Don't lie to yourself.
    Offline

    15
    I thought the paper was quite tough.
    Offline

    0
    ReputationRep:
    Are there any model answers out yet?
    Offline

    2
    ReputationRep:
    (Original post by SB0073)
    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.
    Bump someone answer please
    Offline

    4
    ReputationRep:
    Will I still get an A if I loose 10-12 marks max?
    Offline

    1
    ReputationRep:
    (Original post by avi haria)
    Anyone with the model answers for the ial s2 paper
    apparently nope :/ we are always the ignored ones. Do you still remember your answers?
    Offline

    2
    ReputationRep:
    (Original post by tazza ma razza)
    can't think of anything i got wrong (perhaps 6 part c i put 57 instead of 56) otherwise everything i put down was the same as people i have spoken to.

    So i think minimum 72/75 (including random mistakes)

    any ideas on grade boundaries?
    The power was equal to 2(n) n was equal to 28 which multiplied by two was 56. Therefore the answer is 28.
    Offline

    2
    ReputationRep:
    (Original post by Al_YG)
    The power was equal to 2(n) n was equal to 28 which multiplied by two was 56. Therefore the answer is 28.
    How many marks for that q
    Offline

    2
    ReputationRep:
    (Original post by Johnny Sins)
    Will I still get an A if I loose 10-12 marks max?
    possibly
    Offline

    2
    ReputationRep:
    (Original post by avi haria)
    Anyone with the model answers for the ial s2 paper
    How did you find the paper?
    Offline

    2
    ReputationRep:
    (Original post by hank_the_tank)
    I did!! wanna discuss the answers?
    Sure. How did you find the paper?
    Offline

    3
    ReputationRep:
    (Original post by fefssdf)
    for this question I didn't end up with a quadratic... I had the mean = 0.02n and then variance i had it as 0.16n.. is this wrong ?
    you have to divide by sqrt(0.16n) when standardising
    Offline

    1
    ReputationRep:
    Would marks be lost for writing 41.90 rather than 41.88? (Question 7d)
    Offline

    14
    ReputationRep:
    (Original post by SB0073)
    Bump someone answer please
    you will get 4/5 marks
    Offline

    2
    ReputationRep:
    Q1-
    1.41=1.4419 so mean=varaiance so use poisson
    0.2510
    0.7769
    0.1378
    0.1516

    Q2-
    n=60
    0.0133
    0.0159
    not sure about this one someone please reply to this one: 23.69%>1% accept H0.

    Q3-
    1/2
    151PI/3 REPLY TO THIS as well PLZ

    Q4-
    B=8
    A=-12
    K=1/9

    Q5-
    N=225

    Q6-
    57


    Q7-
    1.2
    0.24
    41.875 AND 40 REPLY TO THIS ONE IT IS ABOUT THE MONEY LAST ONE.
    Offline

    19
    ReputationRep:
    (Original post by kingaaran)
    you have to divide by sqrt(0.16n) when standardising
    thats what I did..
    Offline

    2
    ReputationRep:
    (Original post by Raees_Sharif)
    you will get 4/5 marks
    Where did I go wrong?
    Offline

    10
    ReputationRep:
    how many marks was the P(7<R<10) question
    Offline

    1
    ReputationRep:
    (Original post by igotohaggerston)
    how many marks was the P(7<R<10) question
    1 mark
    Offline

    15
    ReputationRep:
    (Original post by SB0073)
    Where did I go wrong?
    I LOST A FRIEND


    Posted from TSR Mobile
 
 
 
Poll
Do you agree with the PM's proposal to cut tuition fees for some courses?

The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

Write a reply...
Reply
Hide
Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.