Examlex
For plants, the distribution of age classes in an age pyramid is often highly skewed.
Independent Variable
The variable that is intentionally changed by the researcher in an experiment to see if it produces an effect.
Internal Validity
Refers to how well a study is conducted, specifically whether it establishes a causal relationship between variables.
Causal Relationship
A connection between variables where a change in one directly influences the change in another.
Length Of Test
The duration or number of items that constitute a test, influencing factors such as assessment fatigue and comprehensiveness of evaluation.
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