The mean of the sample means and the standard deviation of 50 samples of size 5 taken from a production process under control are found to be 300 and 25, respectively. The lower control limit for the 
chart is located at:
A) 333.54
B) 289.39
C) 310.61
D) 266.46
E) 342.88
Correct Answer:
Verified
Q1: Small haphazard changes in a process variable
Q2: For a Q3: If a process is in control, we Q4: Once a process is in control and Q6: The first objective in statistical process control Q7: If a process is in control, we Q8: Assignable cause variation refers to variation in Q9: Random cause variation refers to variation n, Q10: Fifty samples of size 500 were drawn Q11: Twenty five samples of size 1000 each
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