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  1. x-gamer-x

    Mathematics: Post your doubts here!

    anyone plz help me in Q1 (ii) thanks in advance http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_w09_qp_62.pdf
  2. x-gamer-x

    A level Statistics doubt??Post your doubts here!

    anyone plz help me in Q1 (ii) Anika Raisa kiara15 syed1995 or any one http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_w09_qp_62.pdf
  3. x-gamer-x

    A level Statistics doubt??Post your doubts here!

    check this
  4. x-gamer-x

    A level Statistics doubt??Post your doubts here!

    within 12g means 20+12 and 20-12 so P( 8< 32 ) = 0.94 now standardize this and solve :)
  5. x-gamer-x

    A level Statistics doubt??Post your doubts here!

    plz some one how to do this it will be so nice A team of 4 is to be randomly chosen from 3 boys and 5 girls. The random variable X is the number of girls in the team. Draw up a probability distribution table for X.
  6. x-gamer-x

    A level Statistics doubt??Post your doubts here!

    no prob just remember me in ur prayers
  7. x-gamer-x

    A level Statistics doubt??Post your doubts here!

    add all hope that helped
  8. x-gamer-x

    A level Statistics doubt??Post your doubts here!

    wait i think its the only one other are in the book i.e. exclusive, exhaustive and independent
  9. x-gamer-x

    A level Statistics doubt??Post your doubts here!

    see we have only two outcomes either a head or tail and we have tossed 12 times so no. of outcomes^no. of experiment done hope u understand
  10. x-gamer-x

    A level Statistics doubt??Post your doubts here!

    2^12 isnt it
  11. x-gamer-x

    A level Statistics doubt??Post your doubts here!

    every one knows the formula
  12. x-gamer-x

    A level Statistics doubt??Post your doubts here!

    then ur mean will be wrong check again
  13. x-gamer-x

    A level Statistics doubt??Post your doubts here!

    add square of all i.e. (48.3^2 + 55.2^2 + . . . 64.1^2) then divide this by 11 then subtract mean^2 and then take square root
  14. x-gamer-x

    A level Statistics doubt??Post your doubts here!

    thanks bro
  15. x-gamer-x

    A level Statistics doubt??Post your doubts here!

    plz solve this and explain :confused: The volume of milk in millilitres in cartons is normally distributed with mean µ and standard deviation 8. Measurements were taken of the volume in 900 of these cartons and it was found that 225 of them contained more than 1002 millilitres. Calculate the...
  16. x-gamer-x

    A level Statistics doubt??Post your doubts here!

    plz someone do this :) The volume of milk in millilitres in cartons is normally distributed with mean µ and standard deviation 8. Measurements were taken of the volume in 900 of these cartons and it was found that 225 of them contained more than 1002 millilitres. Calculate the value of µ.
  17. x-gamer-x

    A level Statistics doubt??Post your doubts here!

    thank u so much bro :) may god bless u and u get all A's and A*s and remember me in ur prayers as well :)
  18. x-gamer-x

    A level Statistics doubt??Post your doubts here!

    thanks bro but for (i) we have to consider negative sign with 1.282sd else we will get wrong answer i.e. .828 i just want to know y we have to use negative sign with 1.282sd :confused:
  19. x-gamer-x

    A level Statistics doubt??Post your doubts here!

    M/J/07 Q3 plz also do part b :)
  20. x-gamer-x

    A level Statistics doubt??Post your doubts here!

    i got 0.828 but correct answer is 7.24. In mark scheme they are getting -1.281 but i m getting it 1.281. I just want to know that y we have to consider negative sign here
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