TABLE 18-3
a Quality Control Analyst for a Light Bulb

question 58

Multiple Choice

TABLE 18-3
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.
$$\begin{array} { l c r } \text { Day } & \bar { X } \text { (in minutes) } & \mathrm { R } \\\hline1 & 58.5 & 5.1 \\2 & 47.6 & 7.8 \\3 & 64.3 & 6.1 \\4 & 60.6 & 5.7 \\5 & 63.7 & 6.2 \\6 & 57.5 & 6.0 \\7 & 55.0 & 5.4 \\8 & 54.9 & 6.1 \\9 & 55.0 & 5.9 \\10 & 62.7 & 5.0 \\11 & 61.9 & 7.1 \\12 & 60.0 & 6.5 \\13 & 58.3 & 5.9 \\14 & 52.0 & 5.2\end{array}$$
-Referring to Table 18-3, suppose the analyst constructs an $\bar{X}$ chart to see if the production process is in-control. What is the lower control limit (LCL) for this chart?

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

Understand the impact of teamwork and communication barriers in project management.

Recognize the importance of cultural aspects in management and safety.

Grasp the significance of contracts in fostering an environment of trust and their role in project success.

Understand the balance between stress and its positive effect on the work environment.

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Definitions:

Glass Ceiling

An invisible barrier that prevents minorities and women from rising beyond a certain level in a hierarchy, especially in a corporate context.

Minority Advancement

The process or policies aimed at increasing representation, opportunities, and support for groups that are underrepresented or disadvantaged in society or specific sectors.

Hidden Barrier

An unseen or not immediately obvious obstacle that prevents or hinders progress or achievement.

Diversity Issues

Diversity issues pertain to challenges and considerations related to managing a diverse workforce, including cultural, racial, gender, and age differences among employees.