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

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  chart is ___.
A)25.913 
B)4.913 
C)111.91 
D)108.10 
E)112.84

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  chart is ___.
A)25.913 
B)4.913 
C)111.91 
D)108.10 
E)112.84

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