Examlex
Explain the difference between a directional and nondirectional hypothesis. Describe the circumstances under which a researcher would prefer a directional hypothesis over a nondirectional hypothesis. Describe the circumstances under which a researcher would prefer a nondirectional hypothesis over a directional hypothesis.
Nicotine
A stimulant and addictive substance found in tobacco products that affects the nervous system.
Dependent Variable
In an experiment, the variable that is being tested and measured, expected to change as a result of manipulations to the independent variable.
Number Of Collisions
In physics, it refers to the total number of encounters between particles, such as atoms or molecules, within a certain period or in a specific reaction.
Independent Variable
A variable in an experiment that is manipulated to observe its effect on the dependent variable.
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