If ?σ Is the Population Standard Deviation, K the Number

question 111

Multiple Choice

If ?σ is the population standard deviation, k the number of samples or subgroups, and n the sample size (number of observations in each subgroup) , what is the distance from the centre line to the upper control limit?

• A) σ
• B) 3 σ
• C) 3 σ / √k
• D) 3 σ / √n

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Definitions:

Centerline

A reference line drawn on a graph or chart that represents the average, norm, or expected value of a set of data or a process control chart.

Process Capability Index

A measure used to quantify how well a process can meet specified output requirements.

Specification Limits

The bounds within which the values of a product, process, or service must lie to meet quality standards.

Proportion Of Defectives

The ratio or percentage of defective items in a batch or production process, indicating the quality or reliability of the manufacturing process.