Histogram facts for kids
A histogram is a concept from statistics. It is a graphical display that tells us about the distribution of the samples involved. They are commonly a picture made from a table with many categories. The table tells how many samples there are in each category.
The word histogram is derived from histos and gramma in Greek. Histos means web or mast. Gramma means drawing, record or writing. A histogram of something is therefore, etymologically speaking, a drawing of the web of this something.
Similar ideas
The histogram is one of the seven basic tools of quality control, which also include the Pareto chart, check sheet, control chart, cause-and-effect diagram, flowchart, and scatter diagram.
A population pyramid is two histograms.
A generalization of the histogram is kernel smoothing techniques. This will construct a smooth probability density function from the supplied data.
Images for kids
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thumbnail
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Histogram of travel time (to work), US 2000 census. Area under the curve equals the total number of cases. This diagram uses Q/width from the table.
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Histogram of travel time (to work), US 2000 census. Area under the curve equals 1. This diagram uses Q/total/width from the table.
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Histogram and density function for a Gumbel distribution
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Symmetric, unimodal
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Skewed right
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Skewed left
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Bimodal
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Multimodal
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Symmetric
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Tips using a $1 bin width, skewed right, unimodal
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Tips using a 10c bin width, still skewed right, multimodal with modes at $ and 50c amounts, indicates rounding, also some outliers
See also
In Spanish: Histograma para niños
