TABLE 18-4 A Factory Supervisor Is Concerned That the Time It Takes

question 125

Multiple Choice

TABLE 18-4
A factory supervisor is concerned that the time it takes workers to complete an important production task (measured in seconds) is too erratic and adversely affects expected profits.The supervisor proceeds by randomly sampling 5 individuals per hour for a period of 10 hours.The sample mean and range for each hour are listed below. She also decides that lower and upper specification limit for the critical-to-quality variable should be 10 and 30 seconds,respectively.
-Referring to Table 18-4,suppose the supervisor constructs an R chart to see if the variability in collection times is in-control.What are the lower and upper control limits for this R chart?

• A)-2.33,43.13
• B)-2.28,42.28
• C)0,42.28
• D)0,43.13

---

Definitions:

CPAP Unit

A medical device used to provide a continuous stream of air to patients during sleep, typically used for treating obstructive sleep apnea.

Back Surgery

Medical procedures aimed at treating spine conditions, including herniated discs, spinal stenosis, and deformities, to relieve pain and restore function.

Safety Regulations

Rules and guidelines designed to ensure safe working environments and practices, often enforced by governing bodies.

Sleep Diary

A record used to track patterns and problems related to sleep, aiding in understanding sleep habits.