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Recent content by Ryan123

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    A Level Economics:

    Qamar Baloch I am just wondering in the first question of efficency dont we have to define at what point a firm may reach productive efficiency?
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    Stat v. 62

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    Stat v. 62

    va var was 16.8
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    Stat v. 62

    hmm well thats what i am confused abt in many mark schemes if you get say 7.25 they take it to be 7 while in tohers they take the one between 7th and 8th so i am hoping all thsoe are right
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    Stat v. 62

    littlecloud11 what was your upper quartile and iq? 205 and 65?
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    Stat v. 62

    i think they will cut 2 marks if you did till that but not sure though. I am not very familiar with their marking.
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    Stat v. 62

    P(445-c<X<445+c)=0.94(i think mean was 445 and s.d was 3.6 or 3.61 i think) P(445-c-445/3.61<Z<445+c-445/r)=.94 P(-c/3.61<Z<c/3.61)=.94 2P(Z<C/3.61)-1=.94 P(Z<C/3.61)=(1+.94)/2 P(Z<C/3.61)=.97 c/3.61=1.881 so c=6.79
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    Stat v. 62

    for the last question of X there was 3 possibilities 0 1 2 right?
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    Stat v. 62

    you guys the remember the value of n and k? is it 144 and 6? and abt the permutation 2nd and third is it 4!*6!*2!*3!(for no.ii) and for no.iii is it (12!-9!*4!)?
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    Stat v. 62

    hm hmm around 6.78 or something like that it was c=1.881*r(and i cant remmeber the s.d value clearly but it was around 3.61 i think)
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    Stat v. 62

    we can discuss all the answers? i remember many of them would like to know if they are correct
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    Stat v. 62

    I i got 2 outliers below Q1 and all values of 300+ in Q3 the iq range was 60-65 not sure
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    Mathematics: Post your doubts here!

    abt the Greengage one not 100% sure but its like this *R*E*E*N(GG)A*E* if you consider both g's as 1 then there is 7 letters and the starts as places where the g's can be then there are 7 slots since in one slot the 3rd g will be placed in the other gg's got 6 slots so its 7!*6/3!(for the eees)
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    A level Statistics doubt??Post your doubts here!

    profits can be eitehr -(24*20) or (450*10-24*200 which are -480 or 4020 its -480 if more than 1 firework fails to work since they get no revenue and only have the cost. From the prev question you found out the prob for failure of more than 1 firework to be 0.264 its 4020 profit when less than 1...
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    A level Statistics doubt??Post your doubts here!

    as far as i know the first can be any colour so its prob is 1 and the one after that cant be the same colour so it will be 2/3 followed by 2/3 until the rest 7 slots are filled....as a result the ans is (2/3)^7
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