The Number of Subjects to Be Used in an Experiment

question 48

Multiple Choice

The number of subjects to be used in an experiment should depend mainly on

• A) the size of the effect
• B) the anticipated variability of the data
• C) the number available
• D) both a and b

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Definitions:

Wet Deposition

The process by which pollutants are removed from the atmosphere and deposited on the Earth's surface via precipitation, like rain or snow.

Dry Deposition

The process by which pollutants in the air settle out onto surfaces, without the involvement of precipitation.

Nitrogen Oxides

Gaseous pollutants, including NO and NO2, produced from combustion processes, contributing to smog and acid rain.

Greenhouse Gases

are gases in Earth's atmosphere that trap heat, contributing to the greenhouse effect and global warming.