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According to Abraham Maslow's hierarchy, self-actualization is the need that must be met first.
Null Hypothesis
A statement made for statistical testing that assumes no effect or no difference between groups or variables being studied.
Statistical Power
The probability that a test will correctly reject a false null hypothesis; a measure of a test's ability to detect an effect, if there is one.
Type II Error
The statistical mistake of failing to reject a false null hypothesis, also known as a false negative.
Sample Size
The number of observations or items selected from a larger population for the purpose of statistical analysis.
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