Quick power estimates for detecting a difference in two population proportions are expedient during early stages of research planning. Such estimates are tabled and graphed in this article. They are shown to be conservative but accurate for most research situations when proportions fall in the range of 0.25 to 0.75. (SLD)

The purpose of this module is to provide the researcher and the consumers of such research with a recognition of the assumptions and appropriate use and interpretation of each of 10 multiple comparison (MC) statistical techniques. In this self-contained and self-instructional module, the user is sensitized to the serious consequences of…