Examlex
When an extraneous variable influences the relationship between the independent and dependent variable, there is a third-variable problem.
Control Groups
In experimental research, groups of participants who do not receive the experimental treatment, used as a benchmark to measure the effects of the treatment.
Probability Samples
Sampling methods in research that give each member of a population a known chance of being selected, facilitating the generalization of results to the larger population.
Randomization Techniques
Statistical methods used to ensure each participant in an experiment has an equal chance of being assigned to any group, reducing bias.
Representative Sample
A subset of a population that accurately reflects the members of the entire population, used in statistical analysis or research studies.
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