Examlex
Explain the purpose of a set operator.
Causal Research
The method of identifying cause-and-effect relationships between variables.
Experiments
A method of testing hypotheses by manipulating variables to observe and measure effects, commonly used in scientific research and product development.
Questionnaires
A research instrument consisting of a series of questions for the purpose of gathering information from respondents, often used in market research.
Primary Data
Data collected directly for a specific research purpose, through surveys, interviews, experiments, etc.
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