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S1 Histogram help!

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    Argh cannot get my head around histograms

    Anyway, this is the question:
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    I know it must be the simplest thing ever since it's question 3 and worth 3 marks :L
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    (Original post by bronn)
    Argh cannot get my head around histograms

    Anyway, this is the question:
    Click image for larger version. 

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Views:	85 
Size:	29.1 KB 
ID:	148694


    I know it must be the simplest thing ever since it's question 3 and worth 3 marks :L
    There is 6 integere values for x in the range of 10-15 which means 2cm for the width of the bar representing this range, and there is 3 integer values in the range of 16-18, which is half of the 6 values.
    What do you think about the with of the bar representing this range?
    Similarly to the frequencies.
    5 cm height represents 15, then 5/15=1/3 cm represents frequency 1.
    How many cm represents frequency 9 (9 times 1)?
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    (Original post by ztibor)
    There is 6 integere values for x in the range of 10-15 which means 2cm for the width of the bar representing this range, and there is 3 integer values in the range of 16-18, which is half of the 6 values.
    What do you think about the with of the bar representing this range?
    Ahh right so the width must be half the width of the range 10-15 so is 1cm?


    (Original post by ztibor)
    Similarly to the frequencies.
    5 cm height represents 15, then 5/15=1/3 cm represents frequency 1.
    How many cm represents frequency 9 (9 times 1)?
    this doesn't make sense to me? The mark scheme answer is 6cm?

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Updated: May 17, 2012
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