The Variance of a Sample of 121 Observations Equals 441

question 57

Multiple Choice

The variance of a sample of 121 observations equals 441. The standard deviation of the sample equals

• A)11.
• B)21.
• C)1.91.
• D)231.

---

Definitions:

Contingency Management

A behavioral intervention technique that modifies behavior by changing the consequences that are contingent on that behavior.

Counterconditioning

A behavioral therapy technique that involves replacing an undesirable response to a stimulus with a more desirable one.

Self-Management

The ability of an individual to manage their own actions, emotions, and thoughts, aiming towards achieving personal goals and maintaining well-being.

Participation Rate

The proportion of eligible individuals who actually participate in a study, program, or activity, often used as an indicator of the level of engagement or interest.