G7 Math Q4- Week 4 _ 5- Representation of Data.ppt
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Math 7 PPT
G7 Math Q4- Week 4 _ 5- Representation of Data.ppt
- 2. Types Graphical data can be in many forms. They are information in the form of: Bar charts Histograms Pie charts Tables diagrams Pictures Line graphs pictographs
- 3. Functions To show the information more clearly To make information easier to understand To show how two sets of information or variables amounts are related usually by lines or curves To explain how what is being represented works A key is provided to represent information in the graph
- 4. To draw a graph you need to plot results along the x and y axes Different amounts are presented by thin vertical or horizontal rectangles which have the same width but vary in height or length Information is usually very clear and detailed
- 5. Tables Probably the most frequently used visual in reports Presents quantitative information Arrange facts and numbers in rows and columns Information can be easily tabulated for easy reference Systematic form of presenting data
- 9. Bar Charts Enable visual comparison Used to compare related items Illustrate changes in data over time Show how parts relate to a whole Bars can be presented vertically, horizontally, grouped or segmented
- 12. Line Graphs Show changes over time thus indicating trends Do not provide precise data but give an overall or impression of the data Used to highlight important points or trends Simple line graphs show just one variable Multiple line graphs combine several variables
- 15. Pie charts Enable readers to see a whole and the proportions of its components or wedges Less flexible than bar or line graphs Useful in showing percentages A wedge can be exploded or popped out for special emphasis Include actual percentage or absolute value for each wedge
- 16. Use four to eight segments for best results Distinguish wedges with colours, shading or cross- hatching Keep all labels horizontal
- 19. Graphical data can be used to analyse data from different sources: Sales profit and sales loss Tabulating the results of a survey Comparison of different years To show progress Makes information quick easier to understand than written reports
- 20. When to use visuals To clarify – support text descriptions of graphic topics: quantitative or numeric information To simplify – divide complicated descriptions into components To emphasize – call attention to important points by illustrating them with line, bar or pie chart
- 21. To summarize – review major points in the narrative by providing a chart or table to sum up the data To reinforce – present information in visual form to supplement description in text To attract – make material seem more interesting by breaking up the text with visual aid
- 22. To impress – to convey authenticity and precision To unify – depict the relationships among various elements of a whole
- 23. Effective visual choice Table – to present individual, exact data Line graph, bar graph – to show trends in one or more variable, or the relationship between those variables over time. To compare two or more sets of data. Pie chart – to show frequency or distribution of parts in a whole
- 25. Differentiate line graph and bar graph. What is the importance of using line, bar and pie graph?
- 26. Draw an example of the following representation of Data. Bar charts Histograms Pie charts Tables diagrams Pictures Line graphs pictographs
- 27. Content, images, text, etc. used belong to the rightful owner. No copyright infringement intended