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    Hi,
    I'm studying S1 on my own. A tiny uncertainty is eating at me. When working with grouped tables, some sources say when finding the position of the median just use "num of observations/2"...while others say stick to the rule of "(n + 1)/2".

    It seems unlikely that a question will arise that it matters which you use...BUT, what if I did get a question that the true median position is 15.5 and observation 15 falls in group A and observation 16 falls in group B. Is this not an example where the two rules will take you different directions?

    Please help
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    (Original post by Ducky_)
    Hi,
    I'm studying S1 on my own. A tiny uncertainty is eating at me. When working with grouped tables, some sources say when finding the position of the median just use "num of observations/2"...while others say stick to the rule of "(n + 1)/2".

    It seems unlikely that a question will arise that it matters which you use...BUT, what if I did get a question that the true median position is 15.5 and observation 15 falls in group A and observation 16 falls in group B. Is this not an example where the two rules will take you different directions?

    Please help
    http://www.onlinemathlearning.com/me...ncy-table.html

    that's what I've been taught
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    (Original post by Ducky_)
    Hi,
    I'm studying S1 on my own. A tiny uncertainty is eating at me. When working with grouped tables, some sources say when finding the position of the median just use "num of observations/2"...while others say stick to the rule of "(n + 1)/2".

    It seems unlikely that a question will arise that it matters which you use...BUT, what if I did get a question that the true median position is 15.5 and observation 15 falls in group A and observation 16 falls in group B. Is this not an example where the two rules will take you different directions?

    Please help
    Find a text book that is approved by the board that you are studying for

    Their version of rules will be what you want
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    Thanks guys...I'll get checking my exam board text book. If I find no certainty, I'll look to Mr Jeans method, which is probably the example I see most.
 
 
 
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