Statistics may be described as the process of collecting, gathering meaningful numbers and analyzing of data to make comparisons and see outlines in research results.  Statistics uses probability theory to estimate population parameters through sampling procedure and for making effective use of numerical data which is related to some groups of individuals or experiments. Statistical analysis comprises of descriptive statistics and inferential statistics.

Statistics is the ever expanding branch of mathematical science to deal with numbers effectively. Now days each and every process related to operations or functions generate some kind of output in terms of data. The data need to be analyzed in order to have a meaningful and well informed decision system. Informed decision is one aspect of human psychology which is highly and progressively associated with statistical interpretations.