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An xˉ\bar { x } Chart Is Being Developed Using 15 Samples of Size 9

Question 98

Multiple Choice

An xˉ\bar { x } 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

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