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datamining help urgent

Last post 09-18-2004, 18:25 by terminator. 0 replies.
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  •  09-18-2004, 18:25 2527

    datamining help urgent

    hi
    here is the data of students in a class

    1,3,6,7,8,9,10,11,19,19,20,24,26,28,30

    my questions is using equal width bins to smooth the data, and number of bins are 3

    what will be the bins using bin boundaries to smooth the data, according to me answer is 

    bin1: 1,3,6,7,8,9,10
    bin2: 11,19,19,20
    bin3: 24,26,28,30

    using bin boundaries

    bin1: 1,1,10,10,10,10,10,10
    bin2: 11,20,20,20
    bin3: 24,24,30,30 (here is my doubt it should be 24 or 21 because we are taking boundary from 21 to divide the bin that is 1-10,11-20,21-30).

    please reply me as soon as possible

    one more question is
     
    for bin mean to smooth data
     
    when i take mean of say bin 1 its coming in decimals like 12.6 so what should i write 12.6 or 13 beacuase we are dealing with data which has number of students how can it be in decimals

    please reply as soon as possible

    thank you

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