Course Solutions Uncategorized Quality Control Analyst Lightbulb Manufacturer Concerned Time Takes Produce Batch Lightbul Q34305484

Quality Control Analyst Lightbulb Manufacturer Concerned Time Takes Produce Batch Lightbul Q34305484

A quality control analyst for a lightbulb manufacturer is concerned that the time it takes to produce a batch of lightbulbs is too erratic. Accordingly, the analyst randomly surveys 5 production periods each day for 8 days and records the sample mean and range for each day. TOTAL 113.6 30.8 DAY 13.6 3.5 2 14.3 3 15.3 5.0 4 12.6 2.8 5 11.8 3.7 6 12.9 4.8 7 17.3 4.5 8 15.8 2.4 X-bar Range Compute for the 1, x-bar [a] 2. Upper control limit of X chart [b] 3. Lower control limit of X chart [c] 4. r bar [d] 5. Upper control limit of R chart [e] 6. Lower control limit of R chart [f]

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