Under-coverage
Under-coverage
Accessible population refers to the subset of a population that is easily reachable or available to researchers for a study. This group is typically more convenient or feasible to study compared to the entire population of interest.
you can use sampling when your population under study is large, expensive and time time consuming to study.... in a nut shell, when studying entire population is expensive we go for sampling...
I would imagine that it is getting a representative sample number and a fraction of the population that does not have bias to the study in question
sample is the population we make our study about them.
It means that the results of the study cannot be claimed to hold for the entire population from which the sample was drawn. The researchers can only claim that their results hold for the individuals selected into their sample.
The study of population change and distribution is demography.
Genes
cheating on study island? Speciation
The target population refers to the entire group of people that researchers are interested in studying or making inferences about. The sampled population, on the other hand, is the specific subset of individuals that are selected to participate in the research study. The sampled population is a smaller, more manageable group that represents the larger target population.
measures what was intended to be measured in a research study