TABLE 18-3
a Quality Control Analyst for a Light

question 33

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.
$$\begin{array} { l c c } \text { Day } & \bar { X } \text { (in minutes) } & R \\\hline 1 & 58.5 & 5.1 \\2 & 47.6 & 7.8 \\3 & 64.3 & 6.1 \\4 & 60.6 & 5.7 \\5 & 63.7 & 6.2 \\6 & 57.5 & 6.0 \\7 & 55.0 & 5.4 \\8 & 54.9 & 6.1 \\9 & 55.0 & 5.9 \\10 & 62.7 & 5.0 \\11 & 61.9 & 7.1 \\12 & 60.0 & 6.5 \\13 & 58.3 & 5.9 \\14 & 52.0 & 5.2\end{array}$$
-Referring to Table 18-3, suppose the analyst constructs an R chart to see if the variability in production times is in-control. What is the center line of this R chart?

• A) 6.0
• B) 6.9
• C) 4.8
• D) 7.1

---

Definitions:

Extra Morphine

The administration of morphine in addition to the standard or initially planned dosage, often for pain management.

Conventional

Following traditional forms and genres, relying on established norms and practices.

Nuclear Power

The use of sustained nuclear fission to generate heat and electricity.

Moral Development

The process through which individuals learn what society considers right and wrong, influencing their behavior, attitudes, and beliefs.