Statistical Analysis of the Average Life of Electric Bulbs: A Comparative Study

Abstract

This thesis -- 'Statistical Analysis of the Average Life of Electric Bulbs: A comparative study' consists of six chapters of which chapter four and five are contributory, chapter six on the summary conclusion of the thesis. First three chapters of the thesis are introduction and discussions on the selection of a life testing model and the underlying methods of statistical inferences which has been used in the subsequent chapters towards the contribution in the' thesis. The introductory chapter one contains a statement of the problem we have undertaken a brief review of earlier studies and exploration of the possibilities of further work in relation to the present study, aims and scope of the study. It also provides a brief discussion on the concept of life testing and reliability and distributions of life times. A survey of some basic life testing models which has been used in con­tributory chapters has also been appended in this chapter. Chapter two of this thesis is devoted on discussions on the selection of a. life testing model to suit the analysis and prediction for a particular set of data. Almost all life testing data available for analysis and prediction are incomplete or censored. Most of the tools and techniques available in life testing literature for discri­minating between competing life testing models are sensitive to the nature and size of censoring……………………..