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    (Original post by lol ok but)
    What values did people get for the chi squared? Did you reject or accept H0?
    Accept
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    This is what I remember and it MAY NOT BE RIGHT

    1(a) 0,7029
    1(b) 0.669
    1(c) 0.1327
    1(d) 0.144
    1(e) 0.462 (should be 0.622)

    2. Mean = ? s2 = ?

    3(a) 0.350
    3(b) 0.1575
    3(c) Var(x) = 2.7736
    3(d) Poisson cannot have an upper limit, people don't borrow books at a constant average rate
    3(e)(i) 30.8p
    3(e)(ii) 5.27p

    4
    (a) k = 10
    (b) P = 0.70
    (c) E(X) = 0.05
    (d) Integrate, ans = 1/300
    (e) SD(X) = 0.0289

    5(a) Test statistic = 2.3386, CV = 2.706 so accept null
    5(b) comment

    6(a) Test statistic = -2.20794, reject null
    6(b)(i) 16.7 +- 1.80
    6(b)(ii) Claim may be valid because 18.7 lies in CI
    6(c) calculated mean and said no

    7(a) Draw graph - DENSITY function, so have to differentiate
    7(b) 61/6 but I got it wrong
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    Yeah man I think I got the exact same on both
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    (Original post by whysocereal)
    What did you guys get for the last 3 marks on question 1? I got 0.622. For the last question I got 73/24 which is 3.042
    i got the sameee
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    (Original post by Sam1231)
    did anyone else get 73/24 for the very last question which is like 3.04167
    Yea get in
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    for 1)e) i did (1-[P(X)=0])(1-[P(Y)=0])(1-[P(Z)=0]) where xyz are the different types
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    Any predictions for grade boundaries?
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    (Original post by lxsinglxbby)
    i got the sameee
    For the last part of q1 did you do (1-e^lambda{A})x(1-e^lambda{B})x(1-e^lambda{C})?
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    (Original post by whysocereal)
    What did you guys get for the last 3 marks on question 1? I got 0.622. For the last question I got 73/24 which is 3.042
    I got both of these answers.
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    (Original post by Salty carpet)
    For the last part of q1 did you do (1-e^lambda{A})x(1-e^lambda{B})x(1-e^lambda{C})?
    I did exactly that except (1-P(X<=0) and multipled all together and got 0.426 or something
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    (Original post by spmenz123)
    I got both of these answers.
    Same. Anyone remember their chi^2 value or how they found it? I merged the first two columns and then used Yate's correction... can't remember my value, although I did reject H1
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    What did you get for the interval question on island C? Now thinking i may have done island B by accident
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    (Original post by Salty carpet)
    Same. Anyone remember their chi^2 value or how they found it? I merged the first two columns and then used Yate's correction... can't remember my value, although I did reject H1
    I did that but accepted H0.

    You can't accept or reject H1, only accept or reject H0.
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    (Original post by Jupers)
    for 1)e) i did (1-[P(X)=0])(1-[P(Y)=0])(1-[P(Z)=0]) where xyz are the different types
    Yes! I thought this was wrong - I got an answer of 0.462
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    (Original post by Salty carpet)
    Same. Anyone remember their chi^2 value or how they found it? I merged the first two columns and then used Yate's correction... can't remember my value, although I did reject H1
    Yeah I did both merging and Yate's, and also accepted H0, can't remember my value though.
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    (Original post by Suits101)
    Yes! I thought this was wrong - I got an answer of 0.462
    I got 0.622 :/
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    (Original post by spmenz123)
    Yeah I did both merging and Yate's, and also accepted H0, can't remember my value though.
    2.3386 look familiar?
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    How did everyone find the exam overall? Similar difficulty to last year?
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    (Original post by tanyapotter)
    I got 0.622 :/
    I got 0.622 as well
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    (Original post by Suits101)
    2.3386 look familiar?
    I think that is the value I got, although I rounded it to 2.34
 
 
 
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