Two samples are drawn from the same population with a known variance, 
2.If the sample sizes are 100 and 400, then the standard error of the mean of the former sample will be half that of the latter.
Definitions:
Physiological Psychologist
A scientist who specializes in studying the biological basis of behavior, focusing on the relationship between the mind and physiological processes in the brain and nervous system.
Comparative Psychologist
A Comparative Psychologist studies the behavior and mental processes of non-human animals in comparison to humans, often to understand the evolutionary aspects of behavior.
Social Psychologist
A scientist who studies how the presence, thoughts, and behaviors of others influence an individual's behavior, thoughts, and feelings.
Evolutionary Explanations
Theories or concepts that describe how evolutionary processes such as natural selection have shaped behaviors or physiological traits in organisms, including humans.
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Q81: Mathematically, reliability can be represented as the