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     Histogram Maker

The following graphical tool creates a histogram based on the data you provide in the boxes below. All you have to do is type your data and also the number of bins (typically between 4 and 10). The tool will construct a histogram for you, corresponding to the data you entered.

Type the data (comma separated):         

Type the number of bins or classes (integer):

(Example: The data could be something like: 2, 4, 10, 4, 8, 9, 2, 2, 2, 4, 5, and the number of bins could be "4")

More About Histograms

What is a histogram? A histogram is a specific type of bar char that takes data from a scale variable, uses groups to categorize possible ranges of values, and it provides the frequency of values in the range, for data set passed. A histogram is an excellent visual tool to get a first glance perspective of the distribution properties of a random variable (especially if the same size of data collected is sufficiently large).

There are variations that can be used for drawing a histogram. Sometimes the y-axis represents frequencies, and other times it represents relative frequencies (percentages), but regardless of the option, the shape will the same (provided that the same bins are used for the X-axis). Also, many software packages like SPSS or Minitab will be able to fit known distribution on top of a histogram to see how well the shape of the distribution fits the shape of the expected distribution.

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