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    (Original post by superxo2)
    What are the general grade boundaries for S1?
    jan 13 was 57/72 for an A
    june 12 was 54/72 for an A
    jan 12 was 57/72 for an A..
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    How were you supposed to go about the question asking for an estimate of the probablity of a male child being heavier than a female child in a random sample of 2 or something? Had absolutely no idea...
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    (Original post by Kcash)
    What did everyone get for the hypothesis question?
    do not reject the null hypothesis i think i put
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    I've got a feeling I did the hypothesis testing one wrong can anyone remember if it said 13 out of the 20? I think it did, if it did I did it wrong cause I worked out 1-P(X<13) should have done 12, if it said 13 in the question anyway?
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    (Original post by gadget)
    I've got a feeling I did the hypothesis testing one wrong can anyone remember if it said 13 out of the 20? I think it did, if it did I did it wrong cause I worked out 1-P(X<13) should have done 12, if it said 13 in the question anyway?
    I think it did say 13 out of the 20, I did 1-P(X<12) but i'm not sure whether that's right
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    yeah thats what I though , yeah what you did is right. It so annoying that I realised when i got out the exam! Oh well I got the same answer so should get method marks
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    I liked that paper! I rejected the null hypothesis as I got like 0.13 or something which was bigger than 0.05
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    (Original post by Mo_maths)
    yh it was 0.0056.. something around that
    0.0056245 I think and then round to 3sf.

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    (Original post by tumblrgirl)
    I think it did say 13 out of the 20, I did 1-P(X<12) but i'm not sure whether that's right
    Yeah that's right I think, I did the same. Did all the question and correct final explanation but I remember I but down reject h0 instead of h1. Do you think I'll still get at least 4/5 marks?

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    (Original post by DarkWillow)
    I liked that paper! I rejected the null hypothesis as I got like 0.13 or something which was bigger than 0.05
    I accepted the null hypothesis!
    Why is everyone rejecting it?!
    I'm confused.

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    (Original post by marviiada)
    Yeah that's right I think, I did the same. Did all the question and correct final explanation but I remember I but down reject h0 instead of h1. Do you think I'll still get at least 4/5 marks?

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    I think you probably should get 4/5 because you did everything else right
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    I got 0.12 something :'/
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    (Original post by wrightster29)
    How were you supposed to go about the question asking for an estimate of the probablity of a male child being heavier than a female child in a random sample of 2 or something? Had absolutely no idea...
    I think it was because there were 9/200 that had a weight heavier than the highest females weight, so 9/200 * 8/199 as you needed to pick two

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    (Original post by Mo_maths)
    REJECT AlTERNATE
    At least someone got the same as me!

    Everyone is saying the opposite

    I don't understand why though because 15 was the critical value was it not?

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    (Original post by gadget)
    yeah thats what I though , yeah what you did is right. It so annoying that I realised when i got out the exam! Oh well I got the same answer so should get method marks
    I did this also, and got 1=0.8684 & got 0.1316, so I rejected the null hypothesis as 0.1316 > 0.05
    Is that wrong
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    (Original post by DarkWillow)
    I did this also, and got 1=0.8684 & got 0.1316, so I rejected the null hypothesis as 0.1316 > 0.05
    Is that wrong
    Personally I put accept null hypothesis as the critical value was 15 and so 13 did not lie in the critical region.

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    Is Null hypothesis Ho or H1?
    As I rejected H1, and accepted H0, her original idea that people were guessing
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    Did anyone else get confused by what the last part of the last question wanted? correct me if I'm wrong, but I thought it said
    "If *** hits the bulls eye in her first three throws she will not take her remaining 3 throws, but if not she will take all six throws"
    I took that to mean she only doesn't take the last 3 throws if she hits bulls eyes in all of her first three throws?
    I might be wrong, but that question seemed to be worded really ambiguously? Might they give me some marks since I got the maths right, just didn't understand what they wanted.
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    (Original post by DarkWillow)
    Is Null hypothesis Ho or H1?
    As I rejected H1, and accepted H0, her original idea that people were guessing
    opposite to what u put
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    for the hypothesis testing: as 13/20 guessed correctly

    P(X≥13) = 1-P(X≤12) =0.13.. (something)

    0.13>sig level

    so accept null hypothesis

    should be like that^ :/
 
 
 
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