A Quality Analyst Wants to Construct a Sample Mean Chart

question 46

Multiple Choice

A quality analyst wants to construct a sample mean chart for controlling a packaging process. He knows from past experience that whenever this process is in control, package weight is normally distributed with a mean of 20 ounces and a standard deviation of two ounces. Each day last week, he randomly selected four packages and weighed each

If he uses upper and lower control limits of 22 and 18 ounces, what is his risk (alpha) of concluding this process is out of control when it is actually in control (Type I error) ?

• A)0.0026
• B)0.0456
• C)0.3174
• D)0.6826
• E)0.9544

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Definitions:

Mass Customization

is a manufacturing technique that combines the flexibility and personalization of custom-made products with the low costs associated with mass production.

Process Analysis

The study of workflow within a business to identify its operational processes and improve efficiency and productivity.

Design Tools

Instruments and software used in the creation, planning, and modifying of products, buildings, and other items.

Build-to-order System

A manufacturing approach where products are assembled or constructed only after a customer's order is received, allowing for customization and reducing inventory costs.