what is considered as a graphical presentation of numerical data
Answers
A graph or chart is an instrument to present statistical information in symbolic fashion. The chart is used to represent numerical data as well as material in abstract form. In addition a certain type of chart (eg. map chart) may be considered a picture of a portion of the earth's surface.
Explanation:
Graphic presentation enjoys numerous forms of expression ranging from the written word to the most abstract of drawings or statistical graphs. When expressed in other than the written word, it affords an important medium of expression which, in health education helps to clarify literally, verbally, or statistically presented health information. The purpose of this medium is to enliven and delineate information by presenting it in concise manner and in such form or pattern as will be helpful to understanding. While this medium may be used alone in advanced study in many fields, it is, more often than not, used in support of, or in clarification of, data that are otherwise presented.
The purpose of the chart is to provide a concise summary or to compare, to contrast, to suggest relationships, or otherwise to explain. It is not a substitute for data ; that is , it does not take the place. Thus it is a symbolic form which, while representative, is explanatory. It may vary in pattern from the simple to the complex depending upon its type, colour arrangement, and the amount of detail that it presents. Its value in health education, as in genera usage, is usually in direct proportion to its simplicity.
The graph is a chart form that is used to present statistical (quantitative) data and to present the relationships between variables. While the terms "chart form" and "graph" are at times used interchangeably, the fact that use of the graph is restricted to the presentation of numerical data sets this form apart from other graphic forms which, though enjoying broader scope as to presentation, are limited in their possibilities for presenting quantitative data. It is this distinctive function of the graph that tends to set it apart from the chart, although it remains a chart form. With the graph as with the chart, the simplest form that serves the intended purpose is usually productive of best results. This most certainly is the case in school usage at both the elementary and secondary grade levels.