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In comparing two population means the statistic under consideration is .
Identical Twins
Twins who develop from a single fertilized egg, sharing the exact same genetic material, and typically, but not always, having very similar appearances.
Environmental Factors
Elements within the external surroundings that can influence the development, behavior, or survival of organisms or systems.
Psychological Disorder
A condition characterized by abnormal thoughts, feelings, or behaviors that cause distress or impairment in personal, social, or occupational functioning.
Identical Twins
Twins who develop from a single fertilized egg, sharing the same genetic material.
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