## histogram
x-axis;
rectangles whose bases are centered on the class midpoints, and whose heights
are proportional to the frequencies in the classes, are then constructed.
Similar is the frequency polygon, constructed by plotting the class
midpoints against their respective frequencies and joining the plotted points.
If it is meaningful to do so (depending on the shape of the polygon, the
certainty felt that the sample is representative of the population, the
way that the data has been classified, etc.) a frequency curve
may be drawn that best fits the plotted points. ## Related category• PROBABILITY AND STATISTICS | |||||||

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