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

question 9

Multiple Choice

SCENARIO 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. $\begin{array}{ccc} \underline{\text { Day } }& \underline{\bar{X} \text { (in minutes) }} & \underline{\text {R}}\\1 & 58.5 & 5.1 \\2 & 47.6 & 7.8 \\3 & 64.3 & 6.1 \\4 & 60.6 & 5.7 \\5 & 63.7 & 6.2 \\6 & 57.5 & 6.0 \\7 & 55.0 & 5.4 \\8 & 54.9 & 6.1 \\9 & 55.0 & 5.9 \\10 & 62.7 & 5.0 \\11 & 61.9 & 7.1 \\12 & 60.0 & 6.5 \\13 & 58.3 & 5.9 \\14 & 52.0 & 5.2\end{array}$

-Referring to Scenario 18-3, suppose the analyst constructs an X chart to see if the production process is in-control. What is the upper control limit (UCL) for this chart?

• A) 62.15
• B) 60.95
• C) 59.85
• D) 58.75

Understand the geometric requirements for the effective design of ratchet and pawl systems.

Recognize the principle and application of levers in mechanical systems.

Gain knowledge on how mechanical advantage applies in practical scenarios with various mechanical components.

Understand the transformation of motion types by mechanical components.

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Definitions:

Competence

The ability to do something successfully or efficiently, often relating to a specific skill or knowledge set.

Intrinsic Motivation

The drive to engage in activities for their own sake, for the satisfaction and pleasure derived from the activity itself, rather than for some external reward.

Extrinsic Motivation

Motivation that is driven by external rewards such as money, fame, grades, or praise, in contrast to intrinsic motivation, which is driven by personal satisfaction or interest.

Extrinsic Motivation

Encouragement stemming from external factors including wealth, recognition, scores, and compliments.