A company that fills soft drinks into bottles has established an -chart and an R-chart to monitor the average fill level in the bottles.To do this,the company has taken a series of samples of size n = 4 bottles.The overall average fill is 12.03 ounces.The average range for the subgroups has been .06 ounces.Suppose,after developing the control chart,a subgroup of size 4 yields a sample mean of 12.09 ounces and a range of .08,which of the following statements is true?
A) The process is in control on both the -chart and the R-chart.
B) The process is out of control on the R-chart but in control on the -chart.
C) The process is out of control on the -chart but in control on the R-chart.
D) The process is out of control on both the -chart and the R-chart.
Correct Answer:
Verified
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