A process that is considered to be in control measures an ingredient in ounces. 10 samples each of size n = 5 has been taken. See next table. The population standard deviation is 1.36.
1. What is the process standard deviation σ? What is σx?. If = z = 3, what are the control limits for the mean chart?
2. What are the control limits for the range chart?
3. Is the process in control? Why?
4. What is your analysis?
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5
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10
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9
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13
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10
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10
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10
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8
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