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Data Collection

Vocab

TermDefinition
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
Created by: donnawiles3