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A process that is considered to be in control measures an ingredient in ounces. Below are the last 10 samples (each of size n-5) taken. The population process standard deviation, a, is 1.36. 1. Sample 10 12 13 10 13 10 10 9 13 10 9 1211 9 10 118 10 12 1210 9 12 13 9 1112 9 1311 10 a) b) c) What is the σ? If z-3, what are the control limits for the mean chart? What are the control limits for the range chart?
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