TABLE 18-4
a Factory Supervisor Is Concerned That the Time

question 102

Short Answer

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.
$$\begin{array} { l l l } \text { Hour } & \bar { X } &R\\\hline 1 & 18.4 & 25 \\2 & 16.9 & 27 \\3 & 23.0 & 30 \\4 & 21.2 & 23 \\5 & 21.0 & 24 \\6 & 24.0 & 25 \\7 & 19.3 & 12 \\8 & 15.8 & 14 \\9 & 20.0 & 13 \\10 & 23.0 & 11\end{array}$$ 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, what is the value of the Cp index?

---

Definitions:

Learning Disabilities

Neurologically based processing problems that interfere with learning basic skills and can affect a person's ability to read, write, speak, or do math.

Learning Disabilities

Disorders that affect the brain's ability to receive, process, analyze, or store information, impacting one's ability to learn at the same pace or in the same way as others.

Legislation

The act of making or enacting laws, typically carried out by a legislative body such as a parliament or congress.

Bilingual Children

Children who have the ability to understand and use two languages through the process of being exposed to two different linguistic environments.