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    Okay, so I've pretty much revised histograms but the one thing I can't figure out is how to work out an unknown higher boundary.

    For example, if the class boundaries are
    Age: 16-19, 20-29, 30-39, 40-49, 50-59, over 59

    How do you find out what to use for 59-? ?
    In the answer book it says to use 59-80, but it's different with other questions and there seems to be no rule.

    Help?
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    (Original post by louisedrake)
    Okay, so I've pretty much revised histograms but the one thing I can't figure out is how to work out an unknown higher boundary.

    For example, if the class boundaries are
    Age: 16-19, 20-29, 30-39, 40-49, 50-59, over 59

    How do you find out what to use for 59-? ?
    In the answer book it says to use 59-80, but it's different with other questions and there seems to be no rule.

    Help?
    Zacken?
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    (Original post by louisedrake)
    Okay, so I've pretty much revised histograms but the one thing I can't figure out is how to work out an unknown higher boundary.

    For example, if the class boundaries are
    Age: 16-19, 20-29, 30-39, 40-49, 50-59, over 59

    How do you find out what to use for 59-? ?
    In the answer book it says to use 59-80, but it's different with other questions and there seems to be no rule.

    Help?
    (Original post by thefatone)
    Zacken?
    Whatever the end of the range is. If the ages only go up to 80, then it's 80. It all depends on the context.
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    (Original post by Zacken)
    Whatever the end of the range is. If the ages only go up to 80, then it's 80. It all depends on the context.
    Hi, yeah that makes sense but there was no age limit on this one. For example, another one I tried was Q1 from ex1B of the Cambridge OCR Stats 1 textbook:

    The speeds, in mPh, of 200 vehicles travelling on a motorway were measured by a radar device. The results are summarised in the following table.

    Speed = 30-40, 40-50, 50-60, 60-70, 70-80, over 80

    That's all the info given and in the answer they use 80-100?

    How are we meant to figure out that 100 should be used?

    Thanks
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    (Original post by louisedrake)
    Hi, yeah that makes sense but there was no age limit on this one. For example, another one I tried was Q1 from ex1B of the Cambridge OCR Stats 1 textbook:

    The speeds, in mPh, of 200 vehicles travelling on a motorway were measured by a radar device. The results are summarised in the following table.

    Speed = 30-40, 40-50, 50-60, 60-70, 70-80, over 80

    That's all the info given and in the answer they use 80-100?
    Does the 100 even matter? Could you take a picture of such a question, please?
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    Usually you just have to make a logical guess - most mark schemes should give you a little leeway
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    (Original post by cynicphysicist)
    Usually you just have to make a logical guess - most mark schemes should give you a little leeway
    thanks! that sounds about right haha
 
 
 
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