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  1. I

    Statistics S1 post your doubts here

    But I need to have an interval from which I would obtain the midpoint to calculate the mean
  2. I

    Statistics S1 post your doubts here

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_s11_qp_63.pdf what about in q 3 iii
  3. I

    Statistics S1 post your doubts here

    It is given in the question <20 doesn't mean from 0-19 since 20 is not included
  4. I

    Statistics S1 post your doubts here

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_w11_qp_62.pdf in q4 iv what is the interval used
  5. I

    Statistics S1 post your doubts here

    But in the marking scheme the points used were (20.5,10)..
  6. I

    Statistics S1 post your doubts here

    http://papers.xtremepapers.com/CIE/Cambridge%20International%20A%20and%20AS%20Level/Mathematics%20(9709)/9709_s11_qp_62.pdf in question 5 i do we have to use class boundaries and in iii I don't get when do we have to subtract from the total can someone please hell me
  7. I

    Statistics S1 post your doubts here

    thank you so much I was just about to correct myself :)
  8. I

    Statistics S1 post your doubts here

    If it is <=100 <=150 <=200 then the interval is from 0-100 100-150 150-200 but if it is < only then there are two methods for example if it is <10 <20 <35 then you can either have the interval as 0-10 10-20 ... or you can use the second method which the actual method 0-9 10-19 and so on but you...
  9. I

    Statistics S1 post your doubts here

    Q3 iii Variance = npq , where n is the number of trials p is the probability of success and q is the probability of failure In this case the number of days is the number of trials hence n=30 and p=0.6 and q=0.4 , var=7.2
  10. I

    Statistics S1 post your doubts here

  11. I

    Statistics S1 post your doubts here

    I am a little bit confused in this area , I am trying to sort it out right know and I will let you know as soon as I do
  12. I

    Statistics S1 post your doubts here

    Probability of houses with numbers greater than 14 =5/12 (16,18,20,22,24) Probability of at least 2=probability of 2 or 3 Probability of 2=5/12*4/11*7/10 *3!/2! (3! Because they can be chosen in any order but you have to divide it by 2! because two of the options are same ) Probability of 3 =...
  13. I

    Statistics S1 post your doubts here

    You are not required to find the mean and standard deviation in this question but if you are asking in general then the mean can be found by creating a CF table from the graph since you have the upper bounds on the x axis and the respective CF on the y axis then you can work out the frequencies...
  14. I

    Statistics S1 post your doubts here

    I Sorry about the spelling thing I was in a hurry If you consider the first place then 3Gs will be together and the question is asking for 2Gs to be together only
  15. I

    Mathematics: Post your doubts here!

    https://www.xtremepapers.com/community/threads/statistics-s1-post-your-doubts-here.33781/#post-787629
  16. I

    Statistics S1 post your doubts here

    http://papers.xtremepapers.com/CIE/Cambridge International A and AS Level/Mathematics (9709)/9709_w13_qp_61.pdf Q1 do we have to do it on a graph paper ? And can someone please sketch it for me
  17. I

    Statistics S1 post your doubts here

    The key word in this question is that they are asking only for 2 of the 3 G to be together
  18. I

    Statistics S1 post your doubts here

    [p
  19. I

    Statistics S1 post your doubts here

    Post any doubts you have in statistics as level but please try providing a link to your question
  20. I

    Physics: Post your doubts here!

    T The area of each small box I is 0.2 *0.2 not 1
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