What LCL and UCL should we use instead of (1) if, instead of xÌ…, we use the sum x₁+ · · · + x_nof the sample values? Determine these limits in the case of Fig. 537.

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4.20 0.5% 4.15 -UCL 4.10 CL 99% 4.05 LCL- 0.5% 4.00 Sample no. 10 1% 0.04 0.0365 UCL 0.03 0.02 99% 0.01 Sample no. 10 Standard deviation Mean