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TABLE 18-3
a Quality Control Analyst for a Light Bulb

question 14

Multiple Choice

TABLE 18-3
A quality control analyst for a light bulb manufacturer is concerned that the time it takes to produce a batch of light bulbs is too erratic. Accordingly, the analyst randomly surveys 10 production periods each day for 14 days and records the sample mean and range for each day.
 Day Xˉ (in minutes)  R158.55.1247.67.8364.36.1460.65.7563.76.2657.56.0755.05.4854.96.1955.05.91062.75.01161.97.11260.06.51358.35.91452.05.2\begin{array} {ccc} \text { Day } & \bar { X } \text { (in minutes) } & R \\\hline1 & 58.5 & 5.1 \\2 & 47.6 & 7.8 \\3 & 64.3 & 6.1 \\4 & 60.6 & 5.7 \\5 & 63.7 & 6.2 \\6 & 57.5 & 6.0 \\7 & 55.0 & 5.4 \\8 & 54.9 & 6.1 \\9 & 55.0 & 5.9 \\10 & 62.7 & 5.0 \\11 & 61.9 & 7.1 \\12 & 60.0 & 6.5 \\13 & 58.3 & 5.9 \\14 & 52.0 & 5.2\end{array}
-Referring to Table 18-3, suppose the analyst constructs an R chart to see if the variability in production times is in-control. The R chart is characterized by which of the following?


Definitions:

Alibi

A claim or evidence that someone was in another place at the time of a crime and therefore could not have committed it.

Interrogate

The process of asking questions, especially in a thorough or formal manner, often used to gather information or confirm details.

Murder Charge

A legal accusation against an individual alleging they have unlawfully killed another person with premeditated intent.

Sensory Memory

The briefest span of memory that enables people to maintain sensory information impressions once the initial stimulus has stopped.

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