Statistics >> Frequency Polygon
If we join the middle points of the tops of the adjacent rectangles of the histogram with line segments, frequency polygon is obtained. It is not essential to draw histogram in order to obtain frequency polygon. This consists in plotting the frequencies along y-axis against the mid values of the corresponding classes along x-axis arid then joining the points by straight lines. The frequency polygon should be extended to the base at both the ends.
Example 5: Draw a histogram and frequency polygon from the following data.
Wages No. of Workers
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