The UCL and LCL for an Chart Are 25

question 137

Multiple Choice

The UCL and LCL for an chart are 25 and 15 respectively.The central line is 20,and the process variability is considered to be in statistical control.The results of the next six sample means are 18,23,17,21,24,and 16.What should you do?

• A)Nothing;the process is in control.
• B)Explore the assignable causes because the second,fourth,and fifth samples are above the mean.
• C)Explore the assignable causes because there is a run.
• D)Explore the assignable causes because there is a trend.

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Definitions:

Frequency

The rate at which something occurs or is repeated over a particular period of time or in a given sample.

Distribution

The process of making a product or service available to the consumer or business user that needs it.

Message

A piece of communication or information conveyed from one person or group to another.

Audience's Perspective

The viewpoint or stance of the intended readers or viewers, which influences how they interpret and engage with content.