Hypothesis is a guiding idea, tentative explanation or statement of Probobilities, serving to intimate and guide observation and research for relevant data and the consideration and certain result or consiquencies. "Hypothesis is an informed gues formulated and tentatively adopted to explain observed facts".
The review of related literature should conclude with a summary of aras of agreement & disagreement in finding review which thoes that summarized related studies are often useful in saving time and efforts.
Mr. L.R. Gay:
The review of related literature involves the systematic identification location and analysis of documents containing information related to research Problem.
According to L.R. Gay "Description research insolves Collection data inorder to test hypothesis or answering question concerning the correct status or the subject of the study".
According to Rubin and Aele: "An Invenstigation of communication events under controlled conditions usually the goals are to explain and to predict relationship among variables.
"Sampling is the process of selecting a number of individual for a study away that the individual represents the large group from which were selected".