Sarah Soliz, Director of Quality Programs, Is Designing $\bar { x }$

question 59

Multiple Choice

Sarah Soliz, Director of Quality Programs, is designing $\bar { x }$ 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 $\bar { x }$ chart is ________.

• A)112.09
• B)5.087
• C)26.087
• D)115.90
• E)110.09

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