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. What is the center line of this R chart?
Definitions:
Seamstresses
Women who sew and make clothing as a profession or hobby, often employing detailed craftsmanship in garment making.
Family Planning
The practice of controlling the number and spacing of children in a family through the use of contraception or other methods of birth control.
Distribution of Wealth
The way in which the wealth of a country or community is divided among its citizens, often highlighting issues of economic equality or inequality.
Concentrated
Having a high density of a particular substance or element in a specific area or volume.
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