Examlex
Which of the following atoms is NOT contained in the molecular structure of amphetamine?
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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