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    (Original post by krishkmistry)
    Did we all accept h0 for the hypothesis test ?


    Posted from TSR Mobile
    I did. I got P(x>=13)=0.1316>0.05 so reject H0. Did you get that or did you do the critical region method?
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    (Original post by Mahinder)
    so for question 3 i did


    x-b(50, 0.1)
    p(x=5)
    = 50c5 x0.1^5 x 0.9^45

    ii)
    x-b(20,0.1)
    p(x>=1)=1-p(x<=0) = 0.874

    then it was expectation question i think so it was 48 x 0.874
    i wrote this bit and the answer for the first part but do you definetly lose marks if you don't write: 50c5 x0.1^5 x 0.9^45
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    (Original post by juniorx)
    i wrote this bit and the answer for the first part but do you definetly lose marks if you don't write: 50c5 x0.1^5 x 0.9^45
    It was 3 marks, so you will probably get a mark for the binomial part, a mark for the 50c5... part and a mark for the answer.
    So you will probably lose a mark.
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    roman that is question 2ii but for question 2i u had to times by 3! because there is 6 ways of getting the outcomes

    there is not just 3 ways of get them
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    (Original post by jonny7bell)
    It was 3 marks, so you will probably get a mark for the binomial part, a mark for the 50c5... part and a mark for the answer.
    So you will probably lose a mark.
    oh great an easy mark lost
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    Someone get the paper up, and I'll do an unofficial MS.
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    There is insufficient evidence to reject ho (accept ho)
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    (Original post by Mahinder)
    roman that is question 2ii but for question 2i u had to times by 3! because there is 6 ways of getting the outcomes

    there is not just 3 ways of get them
    what was this question about?
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    What did people get for 7 iii)? I got 0.8247 but I really wasn't sure as my numerator was P(hitting at least 1 bulls eye, and hitting 1 bullseye) so I just used my answer for part B which was 0.1548.
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    (Original post by Mahinder)
    roman that is question 2ii but for question 2i u had to times by 3! because there is 6 ways of getting the outcomes

    there is not just 3 ways of get them

    W W M
    W M W
    M W W

    surely these are the only ways it can happen?

    correct me if i'm wrong lol, could well be.
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    well i think overall i am now going to get 53/72 which is a b? right? and that is wat i wanted damn happy now all i can do is pray the grade boundaries are low to confirm my b
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    (Original post by juniorx)
    what was this question about?
    The one about the 5 men and 5 women are doing some competition and what is the probability of 2 women and 1man winning
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    juniorx id say u lose a mark for not showing ur calculations unless u mentioned u used the tables in the formual booklet
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    (Original post by princess_96)
    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^ :/
    thank god someone understands how it works. Far too many people not understanding that if it's greater than 0.05 then we accept H0
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    yh ur right roman soz lol
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    For the lasr part of question 6, how did people get 9 or 8 boys had a lower weight than the highest female. I got 12 males cos I read it off at 4.34 which was the highest weight of the female. Could someone please tell me what I did wrong :confused:
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    (Original post by Mahinder)
    yh ur right roman soz lol

    lolz np xoxoxx
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    yes i accpeted the null one and the cr region was 14 and up wards so 13 was not in the critcal region thus which is why i rejected null
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    (Original post by hoa123)
    thank god someone understands how it works. Far too many people not understanding that if it's greater than 0.05 then we accept H0
    In every test I did, I said that we don't have enough evidence to reject the null hypothesis. And every time that got me the marks.
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    (Original post by x-Sophie-x)
    I accepted the null hypothesis!
    Why is everyone rejecting it?!
    I'm confused.

    Posted from TSR Mobile
    You're right, it is accept ho. which is the same as saying insufficient evidence/ do not reject ho
 
 
 
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