Examlex
The nucleus of the typical comet is approximately __________ in size.
Ecologic Study
A type of epidemiological study where the units of analysis are populations or groups of people rather than individuals.
Recall Bias
A systematic error caused by differences in the accuracy or completeness of the recollections retrieved by study participants about past events or experiences.
Case-control Study
A research design in which participants with a certain outcome or disease are compared to those without, to identify and evaluate risk factors or outcomes.
Cholera Infections
A highly contagious bacterial disease causing severe diarrhea and dehydration, usually spread through contaminated water.
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