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1. |
What is the formula for UCL for x bar chart when is known? |
A. | (UCL = bar{ bar{x}} + A_3 bar{s} ) |
B. | (UCL = bar{ bar{x}} A_2 bar{s} ) |
C. | (UCL = bar{ bar{x}} A_3 bar{s} ) |
D. | (UCL = bar{ bar{x}} + A_2 bar{s} ) |
Answer» B. (UCL = bar{ bar{x}} A_2 bar{s} ) | |