A simple analysis of variance is used to study participants who are tested ______.

A) only once
B) only twice
C) once or more
D) twice or more

Tested Once

Refers to conducting a particular test or experiment only one time under a specific set of conditions or parameters.

Tested Twice

The act of conducting a test or evaluation on the same subject or group twice to compare results, check for consistency, or measure change.

Participants

Individuals who take part in a study or research, providing data for analysis.