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:

Industrial Democracy

A system of governance in which workers have a direct or indirect say in the management of the industry or company they work for.

American Federation of Labor

A national federation of labor unions in the United States, founded in 1886, focused on advocating for better working conditions, wages, and rights for workers.

Rural Electrification Agency

Was a U.S. government agency established in 1935 to bring electricity to rural areas, profoundly impacting agricultural productivity and the quality of rural life.

Electricity

A form of energy resulting from the existence of charged particles such as electrons or protons, manifesting as an attraction or repulsion between those particles.