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1. |
The correct expression for UCL for construction of a control chart is given by _____a) UCL = \(\overline{x} + Z_{\frac{\alpha}{2}} (\sigma_x)\) b) UCL = \(\overline{x} – Z_{\frac{\alpha}{2}} (\sigma)\) c) UCL = \(\overline{x} – Z_{\frac{\alpha}{2}} (\sigma_x)\) d) UCL = \(\overline{x} + Z_{\frac{\alpha}{2}} (\sigm |
A. | UCL = \(\overline{x} + Z_{\frac{\alpha}{2}} (\sigma_x)\) |
B. | UCL = \(\overline{x} – Z_{\frac{\alpha}{2}} (\sigma)\) |
C. | UCL = \(\overline{x} – Z_{\frac{\alpha}{2}} (\sigma_x)\) |
D. | UCL = \(\overline{x} + Z_{\frac{\alpha}{2}} (\sigma)\) |
Answer» B. UCL = \(\overline{x} – Z_{\frac{\alpha}{2}} (\sigma)\) | |