The selection of good problem is a matter of asking good questions. Generally, problem statements go through some refinement, normally from broad to specific. The Problem must be stated so that it provides focus and direction for the research.
Variables have different characteristics and therefore, different classifications.
The researcher attempts to explain the dependent variable in termws of the independent variable. In most cases, interval and ratio are treated the same in educational statistics. An operational definition usually includes the method of measurement for a variable. Constants may also need operational definitions. Hypotheses A hypothesis is a conjecture or guess at the solution to a problem or the status of the situation.