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Q1 b) AQA Statistics 1 (SS1B) 2011

Discussion in 'Mathematics' started by Danio, May 3, 2012.

  1. Danio

    Danio New commenter

    ok, so here is a link to the paper:
    http://store.aqa.org.uk/qual/gce/pdf/AQA-MS-SS1B-W-QP-JUN11.PDF
    Without looking at the markscheme,
    What is the standard deviation (Question 1b) for 2 marks.
     
  2. Danio

    Danio New commenter

    ok, so here is a link to the paper:
    http://store.aqa.org.uk/qual/gce/pdf/AQA-MS-SS1B-W-QP-JUN11.PDF
    Without looking at the markscheme,
    What is the standard deviation (Question 1b) for 2 marks.
     
  3. If you're a student, tell us what YOU think it is.
    If you're a teacher, erm, you should know this already.
    btw, your link doesn't work...
    cyolba, not falling for that one again :)
     
  4. Danio

    Danio New commenter

    I'm a teacher, 3.54...
    as does everyone else in the department who has tried it.
     
  5. Danio

    Danio New commenter

    should say june 2011 in the title.

    and the link does work copy it into the address bar
     
  6. pwc9000

    pwc9000 New commenter

    and the mark scheme says???
     
  7. briceanus

    briceanus New commenter

    Are you sure you're talking about the right question here?
    I get 4.217052218 if you use sigma (which strictly you shouldn't as it is a sample)
    or 4.242079454if you use s

    both of these agree with the mark scheme.
    3.54 is way off.
    Bric.
    ps. I used the stats functions of a casio 85 calculator.
     
  8. Danio

    Danio New commenter

    yeah I sat down and did it myself just now, and got the right answer.
    input error somewhere, don't know why four people made the same mistake?
    oh well, sorry to waste your time. I'm relieved, I even went back and checked the scores of last years class on ERA and they all got it right. Which confused me even more!
     

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