Question: Where should the control limits for an X-bar chart be placed if the design of the process sets a = 0.0027 with the following parameters

Where should the control limits for an X-bar chart be placed if the design of the process sets a = 0.0027 with the following parameters (assume that the sample size condition for control charts has been verified)?

(a) µ = 10, σ = 5, and n = 18 cases per batch

(b) µ = -4, σ = 2, and n = 12 cases per batch

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