INTRODUCTION
Statistic is scientifically the method of organizing, summarizing presenting and analyzing collected data coupled with the drawing of valid conclusion and reasonable decision. In a close view, the term statistic is used to denote the data themselves or numbers derived from the data such as averaged when speaking of employment statistic, accident any events statistics etc. After collecting statistics data the investigation has to classify and present them in form that make the important features of his subject matter easily grasped and integrated. The methods of presenting data are as follows:
(i) The text method
(ii) The semi text method
(iii) The tabulate method
(iv) Diagrammatic and geographic method
In this write up we are concentrating on diagrammatic and graphic method which is related to our area of study. The diagrammatic and graphic method of presenting statistical data was introduced in the letter part of the eighteenth century by William Playfair, which consist of using diagrams charts and graphs in presenting data. This entails to readiness and quickly understanding of the presented data Fortunately, information processing technology made a breakthrough in the invention and development of the computer system.
A computer is s machine or electronic devices which stores data, analyze it and produce information as required from the data. The manual presentation of data which involves the using protractors and others in platting of graph, drawing pie charts and others is time consuming and it also create s lot of stress to the investigation which may result to in accurate calculation of the presented data As the world grow in to a computer one and manual presentation of statistical data couldn’t help in the accurate calculation of the existing population. But with the introduction of the computer into the statistical world the computerize system present a terrific advantage over manually based system in that they enable the investigator to bring together promptly and accurate result of the population of a particular area In Nigeria today, there has been a lot of misconception about the introduction of computer and its antecedent effect. Some had gone as far as saying that the impersonal effect associated with the application of computers will eventually lead to unemployment, while there is not altogether false, there are those that I think the introduction of computers in statistical presentation of data is a welcome development that had been log awaited.
