Examlex
The price of gasoline decreased dramatically in the summer of 2009. One likely reason for this change is:
Hypotheses
Proposed explanations made on the basis of limited evidence as starting points for further investigation.
Theory
A system of ideas intended to explain something, especially one based on general principles independent of the thing to be explained.
Nondirectional Research Hypothesis
A hypothesis that predicts a relationship or effect but does not specify the direction of the relationship.
Directional Research Hypothesis
A hypothesis that indicates the anticipated direction of the difference or relationship among variables.
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