Quality and Quality Control

For each of the following cases, find the CL, UCL, and LCL for an x chart based on the given information.

(a) n = 12, x = 16.4, x σ = 1.2. (b) n = 12, x = 16.4, R = 7.6. (c) n = 8, x = 4.1, R = 1.3. (d) n =15, x = 141.7, R = 18.6

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