Which of the Following Describes Variance

question 24

Multiple Choice

Which of the following describes variance?

• A) It is the difference between the maximum value and the minimum value in the data set.
• B) It is the difference between the first and third quartiles of a data set.
• C) It is the average of the squared deviations of the observations from the mean.
• D) It is the average of the greatest and least values in the data set.

---

Definitions:

Error Signal

A signal proportional to the difference between the actual output and the desired output.

Fuzzy Logic PID Controller

A Fuzzy Logic PID Controller is a control system that combines fuzzy logic with the traditional Proportional-Integral-Derivative (PID) control strategy to manage complex dynamic systems.

Feedback Input

In control systems, this is an input derived from the output of the system itself, used to adjust or control the system.