A Quality Analyst wants to construct a control chart for determining whether three machines,all producing the same product,are under control with regard to a particular quality variable.Accordingly,he sampled four units of output from each machine,with the following results: Using the factors for three sigma control limits,what are the sample range (R)chart upper and lower control limits?
A)11.14 and 0
B)9.88 and 0
C)8.66 and 0
D)4.94 and 0
E)4.33 and 0

Question

A Quality Analyst wants to construct a control chart for determining whether three machines,all producing the same product,are under control with regard to a particular quality variable.Accordingly,he sampled four units of output from each machine,with the following results:  Using the factors for three sigma control limits,what are the sample range (R)chart upper and lower control limits?
A)11.14 and 0 
B)9.88 and 0 
C)8.66 and 0 
D)4.94 and 0 
E)4.33 and 0

Quizplus · Accepted Answer

The Answer of A Quality Analyst wants to construct a control chart for determining whether three machines,all producing the same product,are under control with regard to a particular quality variable.Accordingly,he sampled four units of output from each machine,with the following results:  Using the factors for three sigma control limits,what are the sample range (R)chart upper and lower control limits?
A)11.14 and 0 
B)9.88 and 0 
C)8.66 and 0 
D)4.94 and 0 
E)4.33 and 0

A Quality Analyst Wants to Construct a Control Chart for Determining