SCENARIO 15-3
a Quality Control Analyst for a Light Bulb

question 70

Multiple Choice

SCENARIO 15-3
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.
$\begin{array}{rcr}\text { Day }& \bar{X} \text { (inminutes) } &R\\1 & 58.5 & 5.1 \\2 & 47.6 & 7.8 \\3 & 64.3 & 6.1 \\4 & 60.6 & 5.7 \\5 & 63.7 & 6.2 \\6 & 57.5 & 6.0 \\7 & 55.0 & 5.4 \\8 & 54.9 & 6.1 \\9 & 55.0 & 5.9 \\10 & 62.7 & 5.0 \\11 & 61.9 & 7.1 \\12 & 60.0 & 6.5 \\13 & 58.3 & 5.9 \\14 & 52.0 & 5.2\end{array}$
-Referring to SCENARIO 15-3, suppose the analyst constructs an X chart to see if the production process is in-control.What is the center line for this chart?

• A)64.3
• B)59.5
• C)58.0
• D)57.1

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Definitions:

Government Assistance

Programs or financial aid provided by the government to individuals, businesses, or other entities in need of support.

Deferred Gratification

The ability to resist the temptation for an immediate reward and wait for a later reward.

Paycheque

A paycheque is a check issued by an employer to pay an employee for services rendered, typically on a regular basis like weekly or monthly.

Savings Account

A deposit account held at a bank or other financial institution that provides modest interest rates.