i. Calculate control limits for an R-chart and an x-chart ii. Since these data were collected, some new employees were hired. A new sample obtained the following readings: 625, 592, 612, and 635. Is the process still in control?
i. Calculate control limits for an R-chart and an x-chart ii. Since these data were collected, some new employees were hired. A new sample obtained the following readings: 625, 592, 612, and 635. Is the process still in control?
Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
Section: Chapter Questions
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
Transcribed Image Text:Sample
1
2
3
b. The Watson Electric Company produces incandescent light bulbs. The following
data on the number of lumens for 40-watt light bulbs were collected when the
process was in control.
5
Observation 1
604
597
581
620
590
Observation 2
612
601
570
605
614
Observation 3
588
607
585
595
608
Observation 4
600
603
592
598
604
i. Calculate control limits for an R-chart and an x-chart
ii. Since these data were collected, some new employees were hired. A new sample
obtained the following readings: 625, 592, 612, and 635. Is the process still in
control?
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