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    I actually had a thought - How do you we do power and size tests with a normal distribution? Have a feeling this is gonna screw me tomorrow
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    (Original post by tazza ma razza)
    I actually had a thought - How do you we do power and size tests with a normal distribution? Have a feeling this is gonna screw me tomorrow
    You'd do it in terms of the phi (cumulative distribution) function for the normal distribution. With quite a few inequalities

    \displaystyle \Phi(Z) = \Phi\left(\dfrac{X - \mu}{\sigma}\right)

    I doubt they'd expect it
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    (Original post by Euclidean)
    You'd do it in terms of the phi (cumulative distribution) function for the normal distribution. With quite a few inequalities

    \displaystyle \Phi(Z) = \Phi\left(\dfrac{X - \mu}{\sigma}\right)

    I doubt they'd expect it
    OK - would you use the percentage points for the critical region? Or like the method used in S2?
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    (Original post by tazza ma razza)
    OK - would you use the percentage points for the critical region? Or like the method used in S2?
    Percentage points (or whatever the second 'nice' table is called! )
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    (Original post by tazza ma razza)
    apart from june 11, what is a hard paper?

    I think grade boundaries will be:

    100 - 75
    90 - 69
    80 - 64
    June 2013 R maybe 2015?
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    (Original post by 130398)
    June 2013 R maybe 2015?
    cool just did 2015 - got 65 (got the last 8 marks wrong and then made another 2 marks of rounding errors)

    Boundary wise tho, seems about right doesn't it?
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    (Original post by tazza ma razza)
    I actually had a thought - How do you we do power and size tests with a normal distribution? Have a feeling this is gonna screw me tomorrow
    Question 7 of June 2013 R uses type II error with normal. I'm currently looking through the mark scheme trying to work out what the heck is going on.
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    (Original post by electrifeye)
    Question 7 of June 2013 R uses type II error with normal. I'm currently looking through the mark scheme trying to work out what the heck is going on.
    awesome - i will do that paper after the current one im doing
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    can someone link the june 13r paper? I can't open the pdf from the website!
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    The F tables have values for v_1 and v_2 at infinity, do we use these if our v values are very large?

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    (Original post by tazza ma razza)
    can someone link the june 13r paper? I can't open the pdf from the website!
    Find all the papers here: http://www.physicsandmathstutor.com/...rs/s4-edexcel/

    (Original post by Euclidean)
    The F tables have values for v_1 and v_2 at infinity, do we use these if our v values are very large?
    I think that's what they're for, not sure why else they'd be there
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    providing they dont ask an aids qn on ch1 like a batty intergration with a pdf i think we are good.

    Hoping for minimum 75%
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    (Original post by tazza ma razza)
    providing they dont ask an aids qn on ch1 like a batty intergration with a pdf i think we are good.

    Hoping for minimum 75%
    I agree, that's pretty much the only tricky part to a paper.
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    (Original post by tazza ma razza)
    providing they dont ask an aids qn on ch1 like a batty intergration with a pdf i think we are good.

    Hoping for minimum 75%
    That cracked me up 😂😂

    In all seriousness though every paper is the same pretty much they never ask anything new. I'm hoping I can get 90% and bring up my FP2


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    (Original post by ragreener1)
    That cracked me up 😂😂

    In all seriousness though every paper is the same pretty much they never ask anything new. I'm hoping I can get 90% and bring up my FP2


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    power and size etc is a breeze - so is estimating etc however the 7 marks where it all comes from the pdf is gonna tear me a new one i can just tell looool

    C4 as well first is just gonna piss on the parade as well
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    (Original post by tazza ma razza)
    power and size etc is a breeze - so is estimating etc however the 7 marks where it all comes from the pdf is gonna tear me a new one i can just tell looool

    C4 as well first is just gonna piss on the parade as well
    Yeah that's true, in isolation on my own for three hours inbetween
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    (Original post by ragreener1)
    Yeah that's true, in isolation on my own for three hours inbetween
    yuo must be doing ial? i have c4 at 9 and then s4 at 10:45
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    (Original post by tazza ma razza)
    yuo must be doing ial? i have c4 at 9 and then s4 at 10:45
    Nope s4 isn't on IAL. I've got C4 at 9:30 then as my sixth form will only do two exam sessions I have to wait supervised by an invigilator until 2pm when I've got S4


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    (Original post by ragreener1)
    Nope s4 isn't on IAL. I've got C4 at 9:30 then as my sixth form will only do two exam sessions I have to wait supervised by an invigilator until 2pm when I've got S4


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    LOOOOOOOOOOOOOOOOOOOOOOOOOOOOOOL sorry to hear that man aha
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    How did pple find it?
    Q1 was so long. What was your guys test statistic?
    Q2 was your test statistic 1.511?
    There was at algebra this which was lovely
    I had n>1 iff n^2+2n>3n giving the best estimator.
 
 
 
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