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Z-statistic
A measure that describes how many standard deviations an element is from the mean of a population in standardized testing.
Alpha Levels
A threshold value that determines the significance level of a statistical test, representing the probability of rejecting a true null hypothesis (committing a Type I error).
Two-tailed Test
A statistical test that considers the possibility of both positive and negative differences or effects.
Research Hypothesis
A specific and testable prediction about the relationship between two or more variables.
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