She has conducted in-depth research ... samples helps reduce sampling errors. In systematic sampling, every nth item is chosen from a population at regular intervals. For example, if a company ...

ABC News maintains standards for disclosure, validity, reliability and unbiased content in survey research ... and systematic noncoverage or selection bias. As a function of sample size, sampling ...

so it is important to outline the model and include it in your research paper. Your economic model is how you make predictions of what you expect to find in the data. Based on the simple example above ...

My short answer: No. It's not necessary for a medical school applicant to be involved in research, let alone publish a paper ... clinical trial studies, for example, and diagnostic work-up ...