Since this is often impractical, the Sample is often smaller than the Population being generalized about. This unit provides an introduction to content analysis, a research methodology that examines words or phrases within a wide range of texts. Usually your research design will be such that you will not have to collect your own data but can test your hypotheses using data that already exist among the wealth of data available in the public realm. There are basically two types of sources used in research. This module will cover the process of identifying and refining a research problem and evaluating the appropriateness of research design and sampling procedures to address the research question or hypothesis.
Variables are things like weight, performance, time, and treatment.
You measure variables on a sample of subjects, which can be tissues, cells, animals, or humans. You express the relationship between variable using effect statistics, such as correlations, relative frequencies, or differences between means. The concept of independent and dependent variables is no different than that seen in introductory algebra. A glossary of statistical terms and a list of references for further study are included. For an overview of his collection and talks that he has given relating to this collection go to his homepage.