ABSTRACT
Sometimes in statistics, the data under study are related to two different variables, that is, information related to two different variables is collected from each and every individual of the population or the sample. From such data, it may be of interest to find out whether there is any mutual relation between the two variables of the data, or is it possible to find value of any one variable on the basis of the data if the value of another variable is known. Correlation and regression analysis are the answers to the above questions.
