TABLE 18-3 A Quality Control Analyst for a Light Bulb Manufacturer Is

question 100

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.
-Referring to Table 18-3,suppose the analyst constructs an chart to see if the production process is in-control.Which expression best describes this chart?

• A)In-control
• B)Increasing trend
• C)Decreasing trend
• D)Individual outliers

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