Examlex
Surpluses, but not shortages, can exist when a market is in equilibrium.
Sampling Bias
A statistical bias that occurs when the sample is not representative of the population from which it was drawn.
Representative Sample
A subset of a population that accurately reflects the members of the entire population.
Stratified Sample
A sampling method that divides the population into subgroups and selects samples from each, ensuring representation.
Cross-sectional Sample
A sample that is taken at one specific point in time from a population to study its characteristics.
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