The _______ the Within-Group Variability, the _______ the Number of Participants

question 51

Multiple Choice

The _______ the within-group variability, the _______ the number of participants the researcher will need.

• A) greater; fewer
• B) lower; greater
• C) greater; greater
• D) None of the above.

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Definitions:

Keystone Species

An organism that other species in an ecosystem significantly rely on, and if it were eliminated, the ecosystem would undergo major changes.

Sea Stars

Marine invertebrates known for their star shape and ability to regenerate limbs, part of the echinoderm family.

Dung Beetles

Beetles that feed on feces, playing important ecological roles such as nutrient recycling and soil aeration.

Keystone Species

Species that have a disproportionately large impact on their environment relative to their abundance, crucial for ecosystem structure and function.