What is “nonignorable nonresponse” and why is that one of the most important concepts you can remember to tell if research is making good claims?
Analysis, Comprehensive Remember that sampling can be described from best to worst as: Random – every subject has an equal chance of being chosen. Stratified- sample is proportional to the populating in characteristics. Systematic-every nth subject is taken from the population. Cluster-naturally occurring groups (convenience) Volunteer-the subject chooses to participate or not. Pay close attention […]