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The X-axis of a frequency polygon typically represents the variable being measured or categorized, such as age groups or test scores. It is a horizontal axis that shows the range of values for the variable. Each interval or category is usually evenly spaced along the X-axis to show the distribution of data points.
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What is A graphic representation of a frequency distribution constructed by connecting the class midpoints with lines?
This is called a frequency polygon.
What are advantages and disadvantages of frequency polygon?
A frequency polygon is not very effective in displaying group data when the class sizes are not the same.
What is the difference between a cummulative frequency graph and a cumulative frequency polygon?
A cumulative frequency polygon has straight lines connecting the points. A normal cumulative frequency diagram uses a smooth curve to join the points.
How do you form a frequency polygon from a frequency diagram?
Identify the midpoint of the top of each bar of the frequency diagram. Join these together and they will form a frequency polygon. Sometimes the polygon is extended down to the horizontal axis to where the midpoints of the bar before the first bar would have been and where the bar after the last bar would have been.
What are frequency Polygon?
Frequency polygons are graphical devices used for understanding the shapes of distribution.
