Examlex
Most nations have exhibited substantial increases in IQ scores during the past century. This phenomenon is called the "_____."
Critical Value
A threshold in hypothesis testing that defines the boundary or cut-off point, beyond which the null hypothesis is rejected.
F-ratio
A statistical test used to determine the ratio of variance between two samples, often used in analysis of variance (ANOVA).
Degrees Freedom
Degrees of freedom are the number of values in a calculation that are free to vary, often related to the sample size in statistical analyses.
F-ratio Equation
The statistical calculation used in ANOVA testing to compare the variance among group means to the variance within groups, indicating whether significant differences exist.
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