Levels are defined as...

Levels are defined as...

• A. The different groups or treatments or conditions.
• B. The number of observations per group.
• C. The scale of measurement.
• D. The effect size categories.

Answer: (A)

Levels are the distinct conditions or categories that a factor can take in a study. In an experiment, a factor is an independent variable with multiple possible values, and each value defines a separate group or treatment. For example, a factor like teaching method might have levels such as traditional lecture, interactive workshop, and online module. The number of levels tells you how many groups you’ll compare. This is not about how many observations you collect per group, the scale of measurement, or how large the observed effects are.

Levels are the distinct conditions or categories that a factor can take in a study. In an experiment, a factor is an independent variable with multiple possible values, and each value defines a separate group or treatment. For example, a factor like teaching method might have levels such as traditional lecture, interactive workshop, and online module. The number of levels tells you how many groups you’ll compare. This is not about how many observations you collect per group, the scale of measurement, or how large the observed effects are.