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(Figure: Determining Surplus) In the graph, the formula for producer surplus is 0.5 × (i - j) × (k - i).
Predictive Validity
The extent to which a score on a scale or test forecasts or correlates with a future behavior, outcome, or criterion.
Reliability
Refers to the consistency and stability of a test or measurement over time.
IQ Scores
Numerical assessments derived from standardized tests designed to measure a person's intelligence relative to their age group.
Test Bias
A characteristic of a test that results in systematic differences in scoring that unfairly advantage or disadvantage certain groups.
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