Grouped data are also represented by frequency polygons. A frequency polygon is a polygon whose vertices are at the midpoint of the tops of rectangles forming the histogram of the frequency distribution. These middle points correspond to the class marks of the corresponding class intervals.
Methods of constructing a frequency polygon:
There are two methods of constructing a frequency polygon for a classified data:
I. with the help of a histogram, and
II. with the help of class marks.
From Frequency Polygon to HOME PAGE
Didn't find what you were looking for? Or want to know more information about Math Only Math. Use this Google Search to find what you need.

New! Comments
Have your say about what you just read! Leave me a comment in the box below. Ask a Question or Answer a Question.