If Our Obtained Chi-Square Value for a 2 X 2

question 1

Multiple Choice

If our obtained chi-square value for a 2 x 2 cross-tabulation is equal to 19.4 and we have 10 respondents in each cell, the phi coefficient is:

• A).696
• B).571
• C)2.14
• D)none of the above

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Definitions:

Keystone Species

Species that have a disproportionately large effect on their natural environment relative to their abundance, often influencing both ecosystem structure and biodiversity.

Entire Community

Refers to all the organisms living within a specific area, encompassing both the living (biotic) and non-living (abiotic) components of the environment.

Crucial Species

Key species that have a disproportionately large effect on their ecosystem's structure and function, often pivotal for biodiversity.

Keystone Species

A crucial species whose presence significantly influences the survival of other species in an ecosystem, and its removal would lead to significant changes in the ecosystem's structure.