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AQA (A) BYA5 - Inheritance, Evolution and Ecosystems: Exam Discussion: watch

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    How did everyone find this paper?
    I thought (compared to unit 6) it was better.

    Might aswell start with the answers...

    Got 0.18 for the heidy-winberg equation...

    Anyone remember anything else?
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    yes 4 mrks in da bag lol

    yeh 0.18! too

    yeh module 5 was better den 6
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    dat antigen questionw as the tricketiest

    and the insect question was hard...>>> thats bout it

    rest was o ryte i guess
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    what did you get for the probabilty of a the couple having a boy with blood group A (i think it was A)
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    (Original post by cherc2005)
    How did everyone find this paper?
    I thought (compared to unit 6) it was better.

    Might aswell start with the answers...

    Got 0.18 for the heidy-winberg equation...

    Anyone remember anything else?
    yeay I got that too!!!!!!!!!! yippy
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    (Original post by cherc2005)
    what did you get for the probabilty of a the couple having a boy with blood group A (i think it was A)
    1/8 i think!

    1/4 chance of A then always 1/2 chance of a boy... 1/4 +1/2 = 1/8

    Prob wrong tho!
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    (Original post by cherc2005)
    what did you get for the probabilty of a the couple having a boy with blood group A (i think it was A)
    i put that there was a 25 percent chance to have a child with blood group A, a 50 perxcent change with Blood group AB and 25 perncent chance for it to have blood group B. Because of codominance. There is a 1:2:1 ratio. I hope this is right what did u put down.
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    (Original post by jimbobismad)
    1/8 i think!

    1/4 chance of A then always 1/2 chance of a boy... 1/4 +1/2 = 1/8

    Prob wrong tho!

    did the question specify boy? I thought it said child
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    i got 1/8
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    I'm sure it said male! I'm not sure though!
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    (Original post by jimbobismad)
    I'm sure it said male! I'm not sure though!
    oh no. do any of u remember how many marks this question was??
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    2 or 3, i would imagine..probably 2
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    what are usually the grade boundaries for a 75 mark test? Do any of u guys know?
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    (Original post by jimbobismad)
    2 or 3, i would imagine..probably 2
    oh k, but im 100 % sure that 1/8 is correct.
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    what degrees of freedom did u get

    and bout the chi squared value being higher than 0.001 value
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    (Original post by Heidi)
    what are usually the grade boundaries for a 75 mark test? Do any of u guys know?
    These were the boundries for June 2004


    Scaled Boundary Mark
    Max: 75
    A:52
    B:47
    C:42
    D:37
    E:33

    Uniform Boundary Mark
    Max:90
    A:72
    B:63
    C:54
    D:45
    E:36
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    (Original post by hussain)
    what degrees of freedom did u get

    and bout the chi squared value being higher than 0.001 value
    i put 1 for the degree of freedoms not sure though
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    (Original post by Heidi)
    i put 1 for the degree of freedoms not sure though
    So did i..

    I put: (N-1) = 2-1 =1 degree of freedom
    (Where N is the number of categories)
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    (Original post by jimbobismad)
    These were the boundries for June 2004


    Scaled Boundary Mark
    Max: 75
    A:52
    B:47
    C:42
    D:37
    E:33

    Uniform Boundary Mark
    Max:90
    A:72
    B:63
    C:54
    D:45
    E:36
    thanks for that.
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    (Original post by jimbobismad)
    So did i..

    I put: (N-1) = 2-1 =1 degree of freedom
    (Where N is the number of categories)
    and for the next question i put 0.05

    and the next i put that it wasn't due to chance and that it was significant or something like that
 
 
 
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