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Download a pdf copy of this help file here |
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Download a pdf copy of this help file here |
Several histogram plots can be overlaid. The plots are easier to read if the histograms are formatted into line plots rather than histogram bars:
Overlaying density plots like this is an intuitive way of comparing the location, spread and shape of two or more distributions. It is not very useful, however, for comparing probabilities. In addition, if one distribution has a much narrower range than the others, the plot will be very flat for the distributions with wider spread.
We recommend that a complimentary cumulative distribution plot is provided alongside the histogram (density) plot to provide the maximum information.
Read on: Cumulative probability plots