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 R chart is ___.
A)0.150
B)0.000
C)0.317
D)2.114
E)1.000

Question

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 R chart is ___.
A)0.150 
B)0.000 
C)0.317 
D)2.114 
E)1.000

Quizplus · Accepted Answer

The Answer of 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 R chart is ___.
A)0.150 
B)0.000 
C)0.317 
D)2.114 
E)1.000

Sarah Soliz, Director of Quality Programs, Is Designing and R