A Security Returns 5%, 4%, 3%, and 6% Over Four

question 18

Multiple Choice

A security returns 5%, 4%, 3%, and 6% over four years. The standard deviation of returns of thesecurity is

• A) 1.51%.
• B) 1.29%.
• C) 1.11%.
• D) 1.00%.

---

Definitions:

PLC System

A PLC system (Programmable Logic Controller) is a digital computer used for automation of electromechanical processes, such as control of machinery on factory assembly lines.

Programming Terminal

A combination of keyboard and monitor used to insert, modify, and observe programs stored in a PLC.

Preventive Maintenance

Scheduled maintenance activities designed to prevent equipment failures before they occur.

I/O Field Devices

Input/Output devices located in the field of an automated system that directly interact with the physical process, such as sensors and actuators.