click below
click below
Normal Size Small Size show me how
Data Collection
Vocab
Term | Definition |
---|---|
SRS (Simple Random Sample) | A sampling design that gives every possible (combination of subjects/units) sample of a given size the same chance of being selected. |
Cluster Sample | A sampling design used when the population already is defined in heterogeneous groups. |
Systematic Sample | A sampling design whereby you use a predetermined scheme to choose subjects. |
Convenience Sample | A BAD sampling design where you choose the most convenient subjects to include in your sample. |
Stratified Random Sample | A sampling design where YOU divide the population into homogeneous groups called strata, then choose SRS from each strata. |
Wording of a Question | The question suggests the response the interviewer desires. |
Voluntary Response | When the sample "chooses itself" by deciding whether to participate STRONG opinions are over represented. |
Undercoverage | Not including a particular group of subjects within the sample |
Non-response | When subjects fail to respond, can't be contacted, or decline to participate |
Parameter | The true proportion of the population that responded in a particular way |
Statistic | The proportion of the sample that responded a particular way - used to estimate the parameter |
Census | A method of systematically collecting information from ALL the members of a population |
Population | ALL members of a group |
Sample | A representative portion of a population |
Experiment | A controlled study |
Treatment | Something we intentionally do to a group to illicit some type of response |
Control Group | Those subjects in an experiment that do not receive the treatment |
Observational Study | Used when we don't need to control lurking variables and collect data by observing subjects without interfering |
Lurking Variable | A variable that may be influencing results and should be considered |
Explanatory Variable | Something that explains the response variable - AKA predictor variable |
Response Variable | The main focus of a study or experiment - AKA dependent |
Simulation | A way to model random events so the outcomes are similar to the outcomes that would occur in reality |