Multiple Choice
A new machine that fills tubes of toothpaste will be monitored using statistical process control. The following data were collected while the machine was closely monitored and under control. Each day a random sample of six tubes are weighed. Based on the data, the process mean is 6.752. 
What is the lower control limit for the x-bar chart rounded to three decimal places?
A) 6.816
B) 6.676
C) 6.688
D) 6.828
Correct Answer:
Verified
Correct Answer:
Verified
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