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TABLE 14-4 A Factory Supervisor Is Concerned That the Time It Takes

question 33

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TABLE 14-4
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.
TABLE 14-4 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 14-4, suppose the supervisor constructs an R chart to see if the variability in collection times is in control. This R chart is characterized by which of the following? A)  decreasing trend B)  increasing trend C)  in control D)  individual outliers
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 14-4, suppose the supervisor constructs an R chart to see if the variability in collection times is in control. This R chart is characterized by which of the following?


Definitions:

Specific Gravity

The ratio of the density of a substance to the density of a reference substance; typically, for liquids, water is used as the reference.

Polycystic Kidney Disease

A genetic disorder characterized by the growth of numerous cysts in the kidneys, which can lead to impaired kidney function and kidney failure.

Anuria

The absence of urine production.

Hematuria

The presence of blood in the urine.

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