# Question: Find the three sigma control limits for a a c chart

Find the three-sigma control limits for

(a) a c chart with process average equal to four nonconformities.

(b) a u chart with c = 4 and n = 4.

(a) a c chart with process average equal to four nonconformities.

(b) a u chart with c = 4 and n = 4.

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