Posted by Josephine on Monday, August 24, 2009 at 1:48pm.
Please can you give me the step to do this exercise? Thank you
Samples of 12volt batteries are taken at 30minute intervals during a production run. Each sample consists of 3 batteries, and a technician records how long each battery will produce 400 amperes during a standard test. Given the following data, also listed in file XR20042, construct 3sigma mean and range control charts and evaluate whether the process is in control.
Minutes Sample Battery1 Battery2 Battery3
13.3 1 13.3 9.4 12.1
9.4 2 12.2 13.4 8.5
12.1 3 11.2 8.2 9.2
12.2 4 7.8 9.7 10.0
13.4 5 10.1 11.4 13.8
8.5 6 9.9 11.7 8.5
11.2
8.2
9.2
7.8
9.7
10.0
10.1
11.4
13.8
9.9
11.7
8.5

business statistics  drwls, Monday, August 24, 2009 at 1:50pm
The "following data" does not show up with your question.

business statistics  Josephine, Monday, August 24, 2009 at 2:18pm
Minutes Sample Battery Battery Battery
$ e 1 2 3
13.3 1 13.3 9.4 12.1
9.4 2 12.2 13.4 8.5 12.1 3 11.2 8.2 9.2
12.2 4 7.8 9.7 10.0
13.4 5 10.1 11.4 13.8
8.5 6 9.9 11.7 8.5
11.2
8.2
Thank you drwls (this is the second part of the exercise)
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