Examlex
Which of the following statements is correct?
Cost
The expenditure or amount of resources (financial, time, labor) required to achieve something.
Time-Series Designs
Research designs that involve repeated measurements of dependent variables over time, both before and after a treatment or intervention, to assess change.
Selection Effects
Biases introduced into research when the participants or subjects are not randomly assigned, potentially leading to unrepresentative samples and skewed results.
Observations
The process of closely monitoring, recording, or noticing specific behaviors, actions, or phenomena, typically as a data collection method in research.
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