Examlex
Observational methods can be used to provide information on past behavior.
Directional
Pertains to specifying the direction of an effect or relationship in hypotheses or experimental research.
Non-directional
Hypotheses that predict a relationship between variables without specifying the direction of the relationship.
Null Hypothesis
A statistical hypothesis that assumes no significant difference or effect exists.
Means
The average of a set of numbers, calculated by summing the numbers and then dividing by the count of those numbers, used to summarize data.
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