CA Foundation · Quantitative Aptitude · Statistical Description of Data
In a frequency polygon drawn from a grouped frequency distribution, the points plotted against the frequencies are located at the:
The points of a frequency polygon are plotted at the mid-points of the class intervals, each against its class frequency, and then joined by straight lines. Upper and lower limits are used for plotting ogives, not frequency polygons.
- AMid-points of the class intervalsCorrect
- BUpper limits of the class intervals
- CLower limits of the class intervals
- DClass boundaries of the first class only
Explanation
A frequency polygon is drawn by plotting each class frequency against the mid-point of its class and joining the points with straight lines. The ends are usually extended to the axis at the mid-points of imaginary classes. Upper or lower limits are used for ogives, not for frequency polygons.
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