How to Choose a Sample Size in Qualitative Research. Quantitative research relies on analyzing statistical data, while qualitative research focuses on answering important business questions ...

Course TopicsPower analyses and sample size calculations are important parts of many research projects. Often, before data are even collected, it is necessary to calculate and justify the required ...

Course TopicsPower analyses and sample size calculations are important parts of many research projects. Often, before data are even collected, it is necessary to calculate and justify the required ...

In planning a research study, investigators are frequently uncertain regarding the minimal number of subjects needed to adequately test a hypothesis of interest. The present paper discusses the sample ...

We studied systematically the problem of sample size for Fisher's exact test of independence in 2 x 2 tables, assuming that neither of the two margins is fixed. In this case, we present tables to ...