From an Energy Perspective, Which Is the Most Efficient Mode

question 68

Multiple Choice

From an energy perspective, which is the most efficient mode of transportation for packages?

• A) car
• B) trucking
• C) rail
• D) air

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Definitions:

External Validity

Relates to whether an experiment has in fact captured the external world that the researcher is investigating.

Attrition

The loss of participants during the course of a study, which can impact the study's outcomes and generalizability.

Nonprobability Sampling

Sampling based on a judgment by the researcher.

Random Assignment

A method in research design that allocates participants to different groups purely based on chance, ensuring that each participant has an equal opportunity to be assigned to any given group.