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Jan
What Are Frequency Polygons. With the help of frequency polygon the data can be interpreted easily. A histogram is a series of rectangular bars with no space between them and is used to represent frequency distributions. A frequency polygon is a graphical form of representation of data. What is the Frequency Polygon A frequency polygon is the polygon obtained by joining the mid-points of upper horizontal sides of all the rectangles in a histogram.
Frequency polygons are a graphical device for understanding the shapes of distributions. It uses a line graph to represent quantitative data. The two end points of a frequency polygon always lie on the x-axis. A frequency polygon gives the idea about the shape of the data distribution. Obtain the frequency distribution and draw a histogram representing it. With the help of frequency polygon the data can be interpreted easily.
They serve the same purpose as histograms but are especially helpful in comparing multiple sets of data.
It is used to depict the shape of the data and to depict trends. Frequency Polygon - Frequency polygons are one type of graphical representation of data. It is similar to a histogram which is also used to visualize grouped data. A frequency polygon is almost identical to a histogram which is used to compare sets of data or to display a cumulative frequency distribution. Essentially the frequency polygon indicates the number of occurrences for each distinct class in the dataset. Statistics deals with the collection of data and information for a particular purpose.