TABLE 17-4 A Factory Supervisor Is Concerned That the Time It Takes

question 84

Multiple Choice

TABLE 17-4
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 17-4,suppose the supervisor constructs an chart to see if the process is in-control.What are the lower and upper control limits of this chart?

• A)10.00,30.00
• B)8.49,32.03
• C)5.39,35.13
• D)4.96,35.56

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Definitions:

Carbon Compounds

Organic compounds that contain carbon atoms and typically hydrogen, possibly along with other elements.

Phenylacetone

An organic compound with the chemical formula C6H5CH2COCH3, known as a precursor in the synthesis of methamphetamine and amphetamine.

Toluene

A colorless, water-insoluble liquid hydrocarbon of the aromatic series, used as a solvent and in the manufacture of various chemicals.

NaCN

Sodium cyanide, a highly toxic chemical compound used primarily in gold mining, as well as in other industrial processes.