Multiple Choice
An chart is being developed using 15 samples of size 9 each.The average of 15 sample means is 6.20.The average of the 15 ranges is 0.30.The lower control limit is _______________.
A) 6.301
B) 6.267
C) 6.133
D) 6.099
E) 6.312
Correct Answer:

Verified
Correct Answer:
Verified
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