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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
Auto Pistons at Wenning ChangAc€?cs plant in Shanghai are produced in a forging process, and the diameter is a critical factor that must be controlled. From sample sizes of 10 pistons produced each day, the mean and the range of the diameter have been as follows.
Â
|
Day |
Mean -x (MM) |
Range R (mm) |
|
1 |
154.9 |
4.0 |
|
2 |
153.2 |
4.4 |
|
3 |
153.6 |
3.9 |
|
4 |
155.5 |
5.2 |
|
5 |
154.6 |
4.3 |
a What is the value of =x?
=x = Â Â mm
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