Addition and Subtraction Are Completely Justified Only When Variables Are

question 10

Multiple Choice

Addition and subtraction are completely justified only when variables are

• A)discrete.
• B)continuous.
• C)ordinal.
• D)interval-ratio.

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Definitions:

Oxygen Requirements

The specific amount of oxygen needed by organisms to sustain their life processes.

Oxygen-Demanding Wastes

Waste materials, typically organic in nature, that reduce the dissolved oxygen in water bodies, affecting aquatic life.

Water Recovery

A process of reclaiming used water for reuse, often involving the treatment of wastewater to remove pollutants and impurities.

Surface Runoff

Water from rain, snowmelt, or other sources that flows over the land's surface and is not absorbed into the ground.