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 ...

The current orthodox way of estimating sample size for a trial is through a power calculation based on a significance test. It therefore carries the assumption that this test should be the centrepiece ...

To improve the reliability of scientific research, we must insist on appropriate sample sizes. And journalists who write about the latest "scary chemical" or "miracle cure" should learn about them.

By using a sample size calculator, you can figure out how many people is enough, ensuring confidence in your statistics.

The large-sample statistical theory for latent-variable structural equation models offers little solace to the developmental psychologist, who is often confronted with less than optimally large sample ...