Multiple Choice
An important characteristic in the proper operation of ignition keys for automobiles is the groove width of the key.In a large manufacturing plant that produces thousands of keys,control charts have been established to monitor the process of cutting the groove.It is believed that the measurement (in inches) of the groove width is Normally distributed.Over a period of time,20 samples,each of size n = 5,were selected in order to establish 3-sigma and s charts.From these samples the following were determined:
= 0.15932 and
= 0.0193438.What is the value of the center line on the chart and on the s chart,respectively?
A) 0.00797;0.001028
B) 0.15932;0.019344
C) 0.00797;0.000967
D) 0.15932;0.000967
E) 0.00797;0.019344
Correct Answer:

Verified
Correct Answer:
Verified
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