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  1. A

    Statistics S1 post your doubts here

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_w05_qp_6.pdf Can anyone please explain Q5
  2. A

    Statistics S1 post your doubts here

    for the actual question _P_P_P_P_P_P_ there are 7 places so 3 china mug can arrange in 7p3 final answer 7P3*6! For your question _C_C_C_ there are only 4 places. 9 plastic mugs cannot be arranged in 4 places 4P9 (you can't do that)
  3. A

    Statistics S1 post your doubts here

    yea sorry i didn't see the ms properly
  4. A

    Statistics S1 post your doubts here

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_w11_qp_63.pdf Can anyone PLEASE explain Q2 i)
  5. A

    Statistics S1 post your doubts here

    No since this Box whisker plot is symmetrical (because the mean you got is in the middle of 39 and 63) due to symmetry of the plot we can say that upper quartile is 75% of the data here the upper quartile is 63 so P(X less than 63)=0.75
  6. A

    Statistics S1 post your doubts here

    1 sd from the mean = 1 sd below or 1 sd above the mean since you have the sd= 3.156 and mean 9.95 you can find the probability ie P(X less than 9.95-3.156) or P(X greater than 9.95+3.156) =P(X less than 6.794) or P(X greater than 13.106) =P(Z less than 6.794-9.95/3.156) or P(Z greater than...
  7. A

    Statistics S1 post your doubts here

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_w05_qp_6.pdf Can anyone PLEASE explain Q5
  8. A

    Statistics S1 post your doubts here

    Find P(X less than 34.6 ) for both symphonies separately For Beethoven’s Sixth Symphony you can use normal distribution to find the probability For Beethoven’s Fifth Symphony they have given P(X greater than 34.6) =0.05 so you can find P(X less than 34.6 ) just by 1-the P(X greater than 34.6)...
  9. A

    Statistics S1 post your doubts here

    Can anyone please explain Q6 from http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_w10_qp_61.pdf and Q5 from http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_w05_qp_6.pdf
  10. A

    Statistics S1 post your doubts here

    In the both questions they use the same method (method 2). ok here is an example Lets say there are 6 different consonants and 4 different vowels in a letter when they ask all 4 vowels should not be next to each other then use method 1 because three vowels can be next to each other But...
  11. A

    Statistics S1 post your doubts here

    yes, use the same method as in part i the difference only is finding the P(x greater than 77) by using the sd you found in part i and you will end up with the same thing finding values from table
  12. A

    Statistics S1 post your doubts here

    since the probability we want is of P(X>77) ie 0.15 because from the normal distribution curve you can see that the area is same for both (X greater than 77) and (X less than 75) and they are at same distance from mean so the probability is same. Or as i told, since you have got your sd you...
  13. A

    Statistics S1 post your doubts here

    Sorry for my bad handwriting. For the second part of this question you can also use normal distribution to find probability as you have got the (sd in the first part)
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    Statistics S1 post your doubts here

    thanks alot can you please help me with mean questions http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s13_qp_63.pdf Q6 (iii) http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_s11_qp_63.pdf Q3 (iii)...
  15. A

    Physics: Post your doubts here!

    if anyone have done any P3 practical paper please upload the table values for graph.
  16. A

    Statistics S1 post your doubts here

    http://papers.xtremepapers.com/CIE/...S Level/Mathematics (9709)/9709_w09_qp_61.pdf Can anyone PLEASE explain Q3 ii)
  17. A

    Mathematics: Post your doubts here!

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_w09_qp_61.pdf Can anyone PLEASE explain Q3 ii)
  18. A

    Mathematics: Post your doubts here!

    Weight (x kilograms) for the (first paper) Mark (for the second paper) Number of pupils in a school (for third paper)
  19. A

    Mathematics: Post your doubts here!

    ZaqZainab can you please solve my doubt
  20. A

    Mathematics: Post your doubts here!

    In the first part (for 36 values) Σ(x − 45) = −148 and Σ(x − 45)^2=3089 Now for finding sd of 37 values we need new Σ(x − 45) and Σ(x − 45)^2 x=29 (x-45)=29-45=-16 so new Σ(x − 45)= -148+(-16)=-164 (x-45)2=(29-45)^2=256 So new Σ(x − 45)^2 =256+3089=3345 now you got new values of Σ(x −...
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