| A | B |
|---|
| simple random | every member of the population has a known and equal chance of selection |
| stratified | the population is divided into mutually exclusive groups then random samples are drawn from the groups |
| cluster | the population is divided into mutually exclusive groups then a random sample of clusters is selected |
| systematic | a list of the population is obtained and a skip interval is used to select participants |
| convenience | the researcher selects the easist population members from which to obtain info |
| judgment | the researcher's selection criteria are based on personal judgment that the persons chosen will likely give accurate info |
| quota | the research finds a prescribed number of people in several categories |
| snowball | the respondents are selected on the basis of referrals from the initial respondents |
| population | the totality of cases that conforms to some designated specifications |
| probability sampling | a sample in which each population elements has a known, nonzero chance of being included in the sample |
| sample | a cross-section chosen to be representative of the target population |
| non-probability sampling | a sample that is not a product of a randomized selection process |
| sampling plan | the procedure that will be used to select a sample |
