CA Foundation · Quantitative Aptitude · Statistical Description of Data
A frequency polygon for a continuous distribution is drawn by plotting frequencies against which values and joining the points by straight lines?
A frequency polygon is drawn by plotting class frequencies against the class mid-points and joining the points with straight lines. This is equivalent to joining the mid-points of the tops of the histogram rectangles. Class limits are used for plotting ogives rather than polygons.
- AClass mid-pointsCorrect
- BLower class limits
- CUpper class limits
- DClass widths
Explanation
A frequency polygon plots each class frequency against the mid-point of the class and joins the points with straight lines. It can also be obtained by joining the mid-points of the tops of the histogram rectangles. Class limits are used for ogives instead.
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