Multiple Choice
Sarah Soliz,Director of Quality Programs,is designing and R charts for the rod shearing process at Stockton Steel.She has 26 samples of rod length,and each sample included measurements of 5 rods.The mean of the 26 sample means is 112 centimetres,and mean of the 26 ranges is 0.15 centimetres.The lower control limit for her chart is ___.
A) 25.913
B) 4.913
C) 111.91
D) 108.10
E) 112.84
Correct Answer:
Verified
Correct Answer:
Verified
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