Human visual processing is very efficient at detecting relationships and changes between sizes, shapes, colors, and quantities. Graphical representations encompass a wide variety of techniques that are used to clarify, interpret and analyze data by plotting points and drawing line segments, surfaces and other geometric forms or symbols. It shows a diagram of the relationship between knowledge, ideas, information, and concepts. Finally, we use Divided Bar charts or Percentage. In Component or sub-divided Bar diagrams are applied for representing data, divided into a number of components. Module 6: Unit 3 Data representation60 Section D: Graphical representations Data can be represented in various ways, and in the following sections you are going to look at the following representations of data… Oops! We can quickly identify red from blue, square from circle. Graphical Re­presentation of Statistical Data Introduction:. Choosing the most appropriate chart depends on a variety of different factors -- the nature of the data, the purpose of the chart, and whether a graphical representation of qualitative data or a graphical representation of quantitative data is being depicted. Graphical representation can be used for both the educated section and uneducated section of the society. For this situation, we may also use Pie chart or Pie diagram, Frequency Polygon is another method of representing frequency distribution, Obtain the frequency distribution and compute the mid points of, Represent the mid points along the X-axis and the frequencies along. Now, taking frequency on the horizontal axis, weights on vertical axis and plotting the above points, we get ogives as given below. =  [Value of the component / Total value] x 360°. Denote the number of students along the Y-axis, with appropriate scale. Frequency Polygons A frequency polygon is a graph … Now, we have to write the points from less than and more than cumulative frequency as given below. Contrary to general belief, data visualization is not a modern development. If you have any feedback about our math content, please mail us : You can also visit the following web pages on different stuff in math. For this situation, we may also use Pie chart or Pie diagram or circle diagram. Ø Graphical Representation: It is the representation or presentation of data as Diagrams and Graphs. Through data visualization you can easily: make sense of data (especially big data), classify and categorize data, find relationships among data, understand the composition of data, understand the distribution of data, understand the overlapping of data… The graphical representation of reports is not free from limitations. There are no accounts that span the entire development of visual thinking and the visual representation of data, and which collate the contributions of disparate disciplines. Typically, bar charts are created with qualitative data (nominal or ordinal variables) while histograms are created with quantitative data (interval-ratio variables). Points from less than cumulative frequency : (43.50, 0), (48.50, 3), (53.50, 7), (58.50, 12), (63.50, 19), (68.50, 28) and (73.50, 36), (43.50, 36 (48.50, 33), (53.50, 29), (58.50, 24), (63.50, 17), (68.50, 8) and (73.50, 0). There are two types of bar diagrams namely, Horizontal Bar diagram and Vertical bar, While horizontal bar diagram is used for qualitative data or data varying over. A chart is a graphical representation of data, in which "the data is represented by symbols, such as bars in a bar chart, lines in a line chart, or slices in a pie chart". Line diagram 2. 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