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histograms - frequency and relative frequency?

  1. #1
    Registered User
    Join Date
    02-07-2006
    Posts
    1

    Unhappy histograms - frequency and relative frequency?

    Hi,

    I'd like to start by thanking everyone in advance for helping students like me.

    I have a problem I'm working on for class and it goes something like this:

    "The salaries (in hundreds of dollars) of a sample of 40 government employees are as follows:

    208 160 175 ...
    265
    173
    ...

    Construct both a frequency histogram (vanilla) and a relative frequency histogram (chocolate). Hint: use six bins."

    Now I've enabled the "Data Analysis" feature, but i'm assuming I need to add some function to enable the frequency thing?

    I apologize for being so lost - I'm trying!

    Thanks people!

  2. #2
    Biff
    Guest

    Re: histograms - frequency and relative frequency?

    Hi!

    >i'm assuming I need to add some function
    >to enable the frequency thing?


    The frequencies are calculated and are output in the histogram.

    Assume your data is in the range A1:B5

    Bins are in the range C1:C10

    Goto Tools>Data Analysis
    Select Histogram
    Fill in the user form
    OK

    Don't know what is meant by a frequency histogram and a relative frequency
    histogram.

    Biff

    "confusedstudent"
    <confusedstudent.22w6db_1139370601.7653@excelforum-nospam.com> wrote in
    message news:confusedstudent.22w6db_1139370601.7653@excelforum-nospam.com...
    >
    > Hi,
    >
    > I'd like to start by thanking everyone in advance for helping students
    > like me.
    >
    > I have a problem I'm working on for class and it goes something like
    > this:
    >
    > "The salaries (in hundreds of dollars) of a sample of 40 government
    > employees are as follows:
    >
    > 208 160 175 ...
    > 265
    > 173
    > ..
    >
    > Construct both a frequency histogram (vanilla) and a relative frequency
    > histogram (chocolate). Hint: use six bins."
    >
    > Now I've enabled the "Data Analysis" feature, but i'm assuming I need
    > to add some function to enable the frequency thing?
    >
    > I apologize for being so lost - I'm trying!
    >
    > Thanks people!
    >
    >
    > --
    > confusedstudent
    > ------------------------------------------------------------------------
    > confusedstudent's Profile:
    > http://www.excelforum.com/member.php...o&userid=31295
    > View this thread: http://www.excelforum.com/showthread...hreadid=509684
    >




  3. #3
    joeu2004@hotmail.com
    Guest

    Re: histograms - frequency and relative frequency?

    "Biff" wrote:
    > Don't know what is meant by a frequency histogram and a
    > relative frequency histogram.


    In the first case, the y-axis is the frequency represented by each
    bin, as you might be used to. In the second case, the y-axis is
    the percentage of the total in each bin-- the bin frequency divided
    by the sum of the frequencies (total number of data).

    Two distributions can have the same relative frequency
    histogram, but different frequency histograms. For example,
    consider a uniform distribution of 1000 data and 10000 data
    over 10 bins. In the frequency histogram, the y-axis is 100
    and 1000 respectively. In the relative frequency histogram,
    the y-axis is 0.1 in both cases.


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