The statistical method is one of the most valuable as well as interesting disciplines for the students of sociology and sociologists. The author lays considerable stress on arrangement of the material under the heads, sociological purpose, statistical data, scientific tests, and reflective analysis. The volume is a methodology to find trustworthy statistics of sociology, principle of statistics like collecting the material, comparing one set of statistics with another, scientific value, intensity of cause, and relations of cause and effect and law of probability.