Plots of Sample Ranges Indicate That the Most Recent Value

question 21

Multiple Choice

Plots of sample ranges indicate that the most recent value is below the lower control limit. What course of action would you recommend?

• A) Since there is no obvious pattern in the measurements, variability is in control.
• B) One value outside the control limits is insufficient to warrant any action.
• C) Lower than expected dispersion is a desirable condition; there is no reason to investigate.
• D) The process is out of control; reject the last units produced.
• E) Variation is not in control; investigate what created this condition.

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Definitions:

Nuclear Envelope

The double-layered membrane that encloses the nucleus of a cell, separating it from the cytoplasm and regulating the passage of materials between the nucleus and cytoplasm.

Double-layered Membrane

A structure consisting of two layers of membrane that can envelop or line cellular organelles or body cavities.

Microvilli

Finger-like protrusions from the surface of some cells, increasing their surface area for absorption.

Cilia

Microscopic, hair-like structures on the surface of cells, moving fluid or mucus across the cell surface.