Sarah Soliz,Director of Quality Programs,is Designing and R Charts

question 21

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 inches,and mean of the 26 ranges is 0.15 inch.The upper control limit for her R chart is ____.

• A) 0.150
• B) 10.57
• C) 0.317
• D) 2.114
• E) 0.713

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