Two independent random samples of sizes 
and 
have been selected from binomial populations with respective parameters 
and 
, resulting in 38 and 65 successes, respectively. Then the standard error of 
is estimated as 0.077.
Definitions:
Big Five Personality Factors
A model that identifies five key dimensions of human personality: openness, conscientiousness, extraversion, agreeableness, and neuroticism.
Heritability
A measure of how much of the variation in a trait within a population can be attributed to genetic differences among individuals in that population.
Personality Traits
Enduring characteristics that describe an individual's behavior, such as introversion or extroversion.
Internal Locus of Control
The belief that one is responsible for their own success and failure; an individual's belief that they can control their life.
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