 | Term | Definition |
| |
subject |
person from whom data are collected |
| |
participant |
person from whom data are collected |
| |
sample |
group of subjects from whom data are collected |
| |
population |
a larger group to whom results can be generalized |
| |
probablility sampling |
method in which subjects are selected randomly in a way where the researcher knows the probablility of selecting each |
| |
simple random sampling |
every member of the population has an equal chance to be selected for the sampling |
| |
systematic sampling |
every n th member of the population is selected |
| |
stratified sampling |
subjects are selected from strata or groups of the population |
| |
proportional stratified sampling |
each strata is represented in the sample in the same proportion as represented in the population |
| |
disproportional stratified sampling |
number of subjects in strata does not reflect the proportion in the population |
| |
nonprobablility sample |
the probablility of including population elements is unknown |
| |
purposive sampling |
selection of particularly informative or useful subjects |
