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Biology graph - dot to dot?

Discussion in 'Science' started by pookyrobin, May 21, 2010.

  1. So this graph should not be a dot to dot.
     
  2. lbaloosy

    lbaloosy New commenter

    I have found instances in mark schemes where short straight lines are preferred over lines of best fit. This is likely the chosen option due to the sensitivity of variables in Biological research and an 'unknowing' of what is occurring between measured points.

    This link is a great read:
    file:///N:/Downloads/A2AS-BIOL--REVISED-Support-9045%20(1).pdf
     
  3. Skeoch

    Skeoch Lead commenter

    Big discussion recently on this on the Biotutor list. I admit to not recalling it in full, but if I remember aright, the answer is "some exam boards allow it in some circumstances and some don't allow it in other circumstances."
     
  4. ScienceGuy

    ScienceGuy Established commenter

    OCR A level Biology has changed from allowing dot to dot graphs for the outgoing specifications to insisting on best fit lines for the incoming ones
     
  5. lindsaygii

    lindsaygii New commenter

    Cambridge IGCSE Biology looks for dot-to-dot, but Physics for line of best fit. I'm quite sure of this because I mark Paper 6 (alternative to practical) for both subjects.
    The teacher is probably following the mark schemes. Whether that is right or wrong is a different debate!
     

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