Examlex
One advantage of television advertising is its low cost.
Observational Study
A research method in which the researcher observes subjects in their natural environment without manipulation or intervention.
Data Collection
The process of gathering and measuring information on targeted variables to answer relevant questions and evaluate outcomes.
Direct Observation
The method of collecting data by seeing and recording events as they occur naturally or in a controlled setting without manipulation.
Random Sample
A subset of a statistical population where each member has an equal chance of being chosen.
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