Question: A process that is considered to be in control measures an ingredient in ounces. Below are the last 10 samples (each of size n =
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 is 1.20.
| Samples | |||||||||
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 9 | 14 | 13 | 11 | 12 | 9 | 9 | 14 | 8 | 10 |
| 10 | 12 | 10 | 9 | 11 | 11 | 12 | 11 | 7 | 12 |
| 9 | 12 | 9 | 12 | 8 | 9 | 11 | 9 | 12 | 9 |
| 8 | 14 | 9 | 11 | 12 | 13 | 8 | 9 | 12 | 7 |
| 12 | 12 | 10 | 9 | 10 | 9 | 8 | 8 | 8 | 11 |
a) Standard deviation of the sampling means = _______ ounces (round your response to three decimal places).
b) UCLx =
LCLx =
c) UCLr =
LCLr =
d) Based on the x bar chart, is one or more samples beyond the control limits?
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