The author Prof. D. Kathamba Rajan has a rich experience of teaching in Business Statistics for nearly four decades. He has also been helping the research scholars in their project works to analysis their results through statistical tools. He was lecturer in Economics at Madura College, Madurai for 2 years and Assistant Professor in Business Administration at Ayya Nadar Janakiammal College, Savakasi for 32 years. Presently, he is the principle of S.S. Duraisamy Nadar Mariammal College, Kovilpatti.