Examlex
Baby Alex smiles mostly during sleep and not in response to his mother's kind expressions.These smiles are:
Research Hypothesis
A specific, testable prediction about the expected outcome of a study, often concerning the relationship between variables.
Population
The complete set of individuals or items that are the subject of a statistical study.
Sample
A subset of a population selected for measurement, observation, or questioning, to provide statistical information about the population.
Nondirectional Hypothesis
A hypothesis that predicts the existence of a relationship, not its direction.
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