Question:
For drawing a frequency polygon of a continuous frequency distribution, we plot the points whose ordinates are the frequencies of the respective classes and abscissae are, respectively
(a) upper limits of the classes
(b) lower limits of the classes
(c) class marks of the classes
(d) upper limits of proceeding classes
Solution:
(c) Class marks i.e., the mid-point of the classes are abscissa of the points, which we plot for frequency polygon.
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