Proper sample selection is based on the study purpose, research question (s), and study
design. Investigators must use care to select a sample population that is representative of …

Sampling is a critical element of research design. Different methods can be used for sample
selection to ensure that members of the study population reflect both the source and target …

Sampling is the process of selecting a small group from the entire population for research.
Selection of sampling method based on the research question should align with the specific …

Abstract “What should be the sample size for my study?” is a common question in the minds
of every research at some point of the research cycle. Answering this question with confident …

The majority of the clinical research is carried out on a sample of participants with a specific
characteristic rather than the entire population. As a result, estimating the appropriate …

Investigators involved in clinical, epidemiological or translational research, have the drive to
publish their results so that they can extrapolate their findings to the population. This begins …

Research, in the broadest sense, includes gathering of data, information and facts for the
advancement of knowledge. It is a systematic investigation done in order to establish or …

Confusion exists among some researchers and educators regarding the classification of
research designs. Some classify quantitative research studies as mixed methods research …

In the first article in the series I explained the importance of study design and gave an
overview of the main types of design. Here, I describe the ways in which the results of a …

Collecting data does not, in itself, make for good research. To answer a research question
requires data that are clean, accurate and valid. Valid data describe accurately what we …