Statistics Dictionary

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An experiment is a controlled study in which the researcher attempts to understand cause-and-effect relationships. The study is "controlled" in the sense that the researcher controls (1) how subjects are assigned to groups and (2) which treatments each group receives.

In the analysis phase, the researcher compares group scores on some dependent variable . Based on the analysis, the researcher draws a conclusion about whether the treatment ( independent variable ) had a causal effect on the dependent variable.

See also:   Data Collection Methods | Statistical Experiments