An Chart for a Normally Distributed Random Variable Has

question 32

Multiple Choice

An chart for a normally distributed random variable has control limits set at ±3 standard errors from the centerline.One sample mean falls outside the control limits when the process is actually under control.The probability that this happened by chance is:

• A).997
• B).500
• C).050
• D).003

---

Definitions:

Petroleum

A natural, flammable liquid consisting of a complex mixture of hydrocarbons, used primarily as fuel and in the production of petrochemicals.

Natural Gas

A fossil fuel formed from the remains of ancient marine organisms, used as an energy source and feedstock in various industrial processes.

Transportation

The process of moving goods, people, or animals from one location to another using various modes such as road, rail, air, or waterways.

Safety Inventory

A buffer of stock kept on hand to protect against variability in demand or supply, ensuring that a product remains available for customers despite uncertainties.