Frequency Polygon Assignment Help

Frequency Distribution Graphical Representation - Frequency Polygon

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

10-15                50

15-20        140

        20-25        110

25-30        150

30-35        120

35-40        100

40-45        80  

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