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Graph a normal distribution chart?

  1. #1
    Barbara
    Guest

    Graph a normal distribution chart?

    I am having trouble graphing the percentage to the bell curve shape. Can
    anyone help? Thanks.

  2. #2
    David Biddulph
    Guest

    Re: Graph a normal distribution chart?

    "Barbara" <[email protected]> wrote in message
    news:[email protected]...
    >I am having trouble graphing the percentage to the bell curve shape. Can
    > anyone help? Thanks.


    If you're looking for the density function for the normal distribution, try
    =(EXP(-POWER(A2,2)/2))/SQRT(2*PI())
    and scale appropriately.

    If you're looking for the cumulative, try
    =NORMSDIST(A2)
    --
    David Biddulph



  3. #3
    Forum Contributor
    Join Date
    02-28-2006
    Posts
    690
    is the normal distribution curve based on the whole class's homework on time scores? And are the pupils the same, ie all come from the same sort of homes with the same level of parental support?

  4. #4
    Barbara
    Guest

    Re: Graph a normal distribution chart?

    David,
    I am not sure about the formula. I try almost every sample formula but
    still can't curve the bell shape. What I want to do is have the mean as a
    percentage and the numbers are as followed: Do I use those formula you gave
    me as well? Thanks.

    74% = 34/46 times
    30% = 14/46 times
    44% = 20/26 times
    26% = 12/46 times

    how do i graph this?

    "David Biddulph" wrote:

    > "Barbara" <[email protected]> wrote in message
    > news:[email protected]...
    > >I am having trouble graphing the percentage to the bell curve shape. Can
    > > anyone help? Thanks.

    >
    > If you're looking for the density function for the normal distribution, try
    > =(EXP(-POWER(A2,2)/2))/SQRT(2*PI())
    > and scale appropriately.
    >
    > If you're looking for the cumulative, try
    > =NORMSDIST(A2)
    > --
    > David Biddulph
    >
    >
    >


  5. #5
    Barbara
    Guest

    Re: Graph a normal distribution chart?

    yes. here is an example i want to chart

    out of 46 times 34 of the times is good that is 74%
    out of 46 times 30 of the times is okay that is 30%
    out of 46 times 20 of the time is not okay that is 44% (within this bracket,
    I want to chart another percentage) of the 44% that is 12/17 or 70% of the
    time does something else
    out of 46 times 12 of the time is bad that is 26% (within this bracket, I
    want to make another percentage) of the 26% that is 12/19 or 63% of the time
    does something else

    "robert111" wrote:

    >
    > is the normal distribution curve based on the whole class's homework on
    > time scores? And are the pupils the same, ie all come from the same
    > sort of homes with the same level of parental support?
    >
    >
    > --
    > robert111
    > ------------------------------------------------------------------------
    > robert111's Profile: http://www.excelforum.com/member.php...o&userid=31996
    > View this thread: http://www.excelforum.com/showthread...hreadid=547635
    >
    >


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