There are very strong proponents for sample size calculation in research proposal. And also, there are various approaches to calculate sample size. For example, to calculate the sample size in a study that wants
- to estimate the prevalence
- to compare the mean difference between 2 treatments or groups
- to estimate the correlation between 2 numerical variables
Previously, I showed and calculated for my clients/students but recently, I have changed my style. I navigated them to various websites that offer sample size calculator. I teach them the concepts and I encourage them to calculate the sample size using those calculators. If they need to verify the results, they can always come back to me …..
So, for the specific objectives list above, the corresponding webpage is listed