Statistics is an important science that applies almost to all research domains. The credibility and generalization of any research are tested using statistics tools. The idea of statistical validation data arises in the past from the novel work of Mendel on the genetics of the pea plant. Before Mendel's work, the credibility of research was proved based on the number of arguments and facts. Even Darwin proves the evolutionary phenomena in his book Origin of Species using a large number of supporting facts. Nowadays, in medical science, each piece of data is tested with statistical tools for its validity. Advancement of information technology has led to the development of various software which can analyze clinical data and perform complicated calculations by themselves, providing direct graphs and tables to the users.