Summary

1. Facts, numbers, measures, observations and other descriptions of things that convey information about those things is called .

2. Data can be organised in a tabular form using marks for easy analysis and interpretation.

3. are the counts of the occurrences of values, measures or observations.

4. Pictographs represent data in the form of pictures, or objects or parts of objects. Each picture represents a frequency which can be 1 or more than 1 — this is called the and it must be specified.

5. Bar graphs have bars of uniform width; the length or height that indicates the total frequency of occurrence. The scale that is used to convert length or height to again, must be specified.

6. Choosing the appropriate scale for a pictograph or bar graph is important to accurately and effectively convey the desired information or data and to also make it appealing.

7. Other aspects of a graph also contribute to its effectiveness and visual appeal such as how colours are used, what accompanying pictures are drawn, and whether the bars are horizontal or vertical. These aspects correspond to the artistic and aesthetic side of data handling and presentation.

8. However, making visual representations of data ‘fancy’ can also sometimes be .

9. By reading pictographs and bar graphs accurately, we can quicklyhardly understand and make inferences about the data presented.