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If a food company tests a new product by having one group of experimental subjects taste this product first, and then a competitor's product second, while a second group of experimental subjects tastes the two products in the reverse order, the experimental design has been:
Narrative Review
A comprehensive analysis of literature on a topic, often qualitative, providing a summary and synthesis of findings.
Meta-analysis
A statistical technique that combines the results of multiple studies to identify patterns, effects, or relationships.
Literature Reviews
Scholarly papers or segments within papers that synthesize existing research on a topic to provide an overview of the state of the art and identify gaps in knowledge.
Null Hypothesis
The hypothesis, used for statistical purposes, that the variables under investigation are not related in the population, that any observed effect based on sample results is due to random error.
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