Fundamentals of Statistics contains material of various lectures and courses of H. Lohninger on statistics, data analysis and chemometrics......click here for more. 
Home General Processing Steps Visualization Frequency Polygons  
See also: histogram, stemandleaf plots, cumulative frequencies, Frequency  
Frequency Polygons
Frequency polygons are basically the same as histograms where the rules valid for histograms are also valid for frequency polygons. They are a smoother alternative to histograms. Frequency polygons can be constructed from histograms by joining the midpoints of the histogram bars with lines. The areas below the histogram and the frequency polygon are equal. In general, one should prefer to use histograms rather than frequency polygons, as the width of the classes cannot be seen well in frequency polygons. Frequency polygons should be used for data on a metric measurement level only. For the bin width the same rules apply as for the histograms.


Home General Processing Steps Visualization Frequency Polygons 
Last Update: 20121008