Advantages of Graphs 26. Frequency polygon is another way to show the information in a frequency table. If the class marks are considered directly, then there is nothing to worry about. It is the mean of the upper limit and the lower limit of the class interval. If intervals are used, the points are the midpoints of the intervals. A frequency polygon displays class frequencies while an ogive displays cumulative frequencies. This should make the data appear simple and easy. Obtain the mid-points of the upper horizontal side of each rectangle. The graph so plotted is also represented in the form of bars so that it is clearer for the people to understand the statistics as such. 1.1 Advantages and Disadvantages of Different Graphs Identify each graph: Line Graph, Bar Graph, Double Bar Graph, Pictograph, Circle Graph . To construct a frequency polygon, first examine the data and decide on the number of intervals, or class intervals, to use on the x … Ø In a graph paper, the frequency of each class is plotted against the mid-value of class (on the … 6. For example, there are no scores in the interval labeled "35," three in the interval "45," and 10 in the interval "55." #rs-demo-id{} Frequency polygons are analogous to line graphs, and just as line graphs make continuous data visually easy to interpret, so too do frequency polygons. Graphical Representation: This is found to be one of the best forms of representation of data. The result is not actually a polygon but more of an open one that ‘floats’ in mid-air! 5. So for instance, if I have a class “10 – 19", then the midpoint is ( 10+19)/2 = 14.5. 10. Frequency Polygon: This graph shows an example of a cumulative frequency polygon. Frequency polygons allow you to see the shape of the distribution easily. For example, if you asked the next 100 people you see what their age was, you would likely get a wide range of answers spanning anywhere from three to ninety-three. A frequency polygon displaying our … She recorded the results of 100 cars. 5. There are many ways in which the data can be graphically represented and frequency polygons are the best and the most efficient of all. Frequency distribution and histograms. 11. Misleading graphs. 3 Educator answers. 12. (C) Sum the frequency counts to determine the total sample size (n = Sf i). 5.2.5.2.1 Frequency polygon has certain advantages over the histogram The frequency polygons of several distributions may be plotted on the same graph, thereby making certain comparisons possible, whereas histograms cannot be usually employed in the same way. Frequency Polygon. Hence, recording all the data is very much important as such. 9. least to greatest. 11. Misleading graphs. Histograms 2. The frequency chart below shows the results of the table. There are many types in which one can choose to represent the data. Tables and graphs are good for a quick, rough overview of a distribution and for comparisons of distributions. It is necessary that the people should select a proper class interval. 1. It looks a little bit like a line graph. 2. 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