SCENARIO 19-3 A Quality Control Analyst for a Light Bulb Manufacturer Is

question 77

Multiple Choice

SCENARIO 19-3
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.

-Referring to Scenario 19-3,suppose the sample mean and range data were based on 11 observations per day instead of 10.How would this change affect the lower and upper control limits of the R chart?

• A)LCL would increase;UCL would decrease.
• B)LCL would remain the same;UCL would decrease.
• C)Both LCL and UCL would remain the same.
• D)LCL would decrease;UCL would increase.

---

Definitions:

Objective Concept

A notion or idea based on factual and measurable evidence rather than personal feelings or opinions.

Observable Phenomenon

Events or occurrences that can be perceived directly through the senses or with the help of scientific instruments.

Not Scarce

Describes resources that are available in abundance and not limited in supply, in contrast to scarce resources which are limited and can be exhausted.