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Statistics is an imposing form of mathematics. Statistics also refers to a subject just as mathematics. Statistics is a body of methods of obtaining and analyzing data in order to base decision on them. It is a branch of scientific method used in dealing phenomenon that can be described numerically either by counts or by measurements. Thus the word statistics refers to quantitive information or to a method of dealing data information.
The methods by which statistical data are analyzed are called statistical methods. It should be noted that statistics is usually not studied for its own sake rather it is widely employed as a tool-and a highly valuable one-in the analysis of problems in nature physical and social nature.
By statistics means aggregates of facts affected to a marked extent by multiplicity of causes, numerically expressed, enumerated or estimated according to reasonable standards of accuracy, collected in a systematic manner for a pretended purpose and placed in relation to each other. Boddington defines Statistics as “the science of estimates and probabilities”.
According to Berenson and Levine “the science of statistics can be viewed as the application of the scientific method in the collection.” Croxton and Cowdon have given a very simple and concise definition of Statistics. In their views statistics may be defined as the collection, presentation, analysis and interpretation of numerical data.
Functions of statistics
The following are the important functions of the science of Statistics:
Statistics presents facts in a definite form.
Statistics simplifies mass of figures.
Statistics facilitates comparison.
Statistics helps in formulating and resulting hypothesis.
Statistics helps in prediction.
Statistics helps in the formulation of suitable policies.
Some of the useful topics of Statistics are given below.
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