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What is frequency curve? How do we draw it?

What is frequency curve? How do we draw it?


Frequency curve is obtained by joining the points of frequency polygon by a freehand smoothed curve. Unlike frequency polygon, where the points we joined by straight lines, we make use of free hand joining of those points in order to get a smoothed frequency curve. It is used to remove the ruggedness of polygon and to present it in a good form or shape. We smoothen the angularities of the polygon only without making any basic change in the shape of the curve. In this case also the curve begins and ends at base line, as is in case of polygon. Area under the curve must remain almost the same as in the case of polygon.

Frequency-response..jpg

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