Business Question Upper And Lower Control Limit Calculation Help complete in excel file. Set control limits for this process and graph the sam- ple data fo | Homework Answers
Business Question Upper And Lower Control Limit Calculation Help complete in excel file. Set control limits for this process and graph the sam-
ple data for both the x- and R-charts.
15-16 Colonel Electric is a large company that produces
lightbulbs and other electrical products. One particu-
lar lightbulb is supposed to have an average life of
about 1,000 hours before it burns out. Periodically,
the company will test five of these and measure the
average time before these burn out. The following
table gives the results of 10 such samples:
SAMPLE 1 2 3 4 5 6 7 8 9 10
Mean 979 1,087 1,080 934 1,072 1.007 952 986 1,063 958
Range
94 57 65 135 134 101 98 145 84
50
(a) What is the overall average of these means?
What is the average range?
(b) What are the upper and lower control limits for a
99.7% control chart for the mean?
(c) Does this process appear to be in control?
Explain.
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ple data fo | Homework Answers
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