TABLE 17-3 A Quality Control Analyst for a Light Bulb Manufacturer Is

question 73

Multiple Choice

TABLE 17-3
A quality control analyst for a light bulb manufacturer is concerned that the time it takes to produce a batch of light bulbs is too erratic. Accordingly, the analyst randomly surveys 10 production periods each day for 14 days and records the sample mean and range for each day.

-Referring to Table 17-3, suppose the analyst constructs an chart to see if the production process is in-control. What is the lower control limit (LCL) for this chart?

• A) 47.60
• B) 56.15
• C) 57.15
• D) 58.05

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Definitions:

Earth Care

A philosophy or practice of taking actions to preserve and protect the environment and the planet's ecosystems.

Deep Ecology

An environmental philosophy and social movement emphasizing the inherent worth of all living beings regardless of their instrumental utility to human needs.

Interdependence

The mutual reliance between different species, systems, or processes in an ecosystem, illustrating how a change in one can affect others.

Fundamental Ecosystems

Basic ecological units comprised of living organisms and their physical environment, interacting as a system.