Which one of the following is a correct representation of PGFs? 
Definitions:
Null Hypothesis
A rephrased definition: A statistical hypothesis that predicts no effect or no relationship between variables, serving as the default position until evidence suggests otherwise.
Analysis Of Variance
A collection of statistical models and their associated procedures which are used to analyze the differences among group means in a sample.
Unrelated Groups
Groups in a study that are independent from each other, where the participants in one group are not matched or linked to those in other groups.
Hypothesis Testing
A statistical method that uses sample data to evaluate a hypothesis about a population parameter.
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