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    (Original post by sam_97)
    Volvox aureus - 4.5
    Volvox globator - 2.3
    Volvox tertius - 1.2
    remembered them random names as well :laugh:
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    (Original post by Jm098)
    remembered them random names as well :laugh:
    Haha thanks
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    (Original post by Ayeros)
    It looks like he did 2(0.35x0.45) to get that answer, guess I got it wrong. Brain fart and only put (0.35x0.45) = 0.1575
    1 mark for that - it's what I did.

    (Original post by tanyapotter)
    was it just 0.35x0.45 for that one question?
    0.35 X 0.45 X 2 (2 different combinations)

    (Original post by irMike)
    Ah, Yeah I got that. Also went for the midpoint for the mean, But I thought that was the sample mean while it wanted the population mean so I was confused, Think it's right though.

    As always I couldn't think of reasons why It's not a poisson distribution, I pretty much take off two marks on every paper knowing I'll get that one wrong. What was the answer?
    Poisson has no upper limit (book stores said you can have a maximum of 6 books) and borrowing books doesn't occur at a constant average rate (library closes/opens at certain dates/times)
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    Ideas on grade boundaries? I'm hoping 72/73 will be enough for full UMS
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    What is a Volvox Sphere even?!
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    (Original post by MahuduElec)
    What is a Volvox Sphere even?!
    According to several websites, Volvox is a genus of green algae. I thought I was sitting a biology exam when I opened the paper!
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    How many marks for the book question with 2 people selecting books?
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    (Original post by Salty carpet)
    How many marks for the book question with 2 people selecting books?
    3 marks
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    (Original post by samham998)
    Ideas on grade boundaries? I'm hoping 72/73 will be enough for full UMS
    Well it was 72 marks for 100 UMS last year, so assuming the grade boundaries don't change too much it's possible
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    (Original post by sam_97)
    Well it was 72 marks for 100 UMS last year, so assuming the grade boundaries don't change too much it's possible
    Last year's paper was harder Imo, i think 100 UMS this year will be 73 at a minimum
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    Answer to last question=71/24?
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    (Original post by Hassan55)
    Answer to last question=71/24?
    Yup.
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    (Original post by MahuduElec)
    Last year's paper was harder Imo, i think 100 UMS this year will be 73 at a minimum
    Yeah maybe, although it's difficult to tell as we don't know how everybody who sat the exam has done
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    Grade Boundary Predictions?
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    I had no idea what to put as to the second mark for the DRV/Poisson bit (For the first I said variance does not equal mean) so I put the events do not occur randomly or singly, anyone think this will get me a mark?
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    (Original post by Hassan55)
    Grade Boundary Predictions?
    ]

    I would say similar to last years although I think this years was slightly easier?

    67 A*

    62 A

    56 B

    50 C

    Although I think the 1/2 markers were a bit trickier this year so I wouldn't be surprised to see similar boundaries
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    How was 1)d supposed to be done?
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    it was 0.1cm^3 so was it like lambda = 0.8 because it was the total?
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    (Original post by FurtherBod)
    it was 0.1cm^3 so was it like lambda = 0.8 because it was the total?
    I got that
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    (Original post by Hjyu1)
    I got that
    Yeah, If I got this I think I'm in for an A
 
 
 
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