A quality analyst wants to construct a control chart for determining whether three machines, all producing the same product, are in control with regard to a particular quality variable. Accordingly, he sampled four units of output from each machine, with the following results

What are the x-bar chart three-sigma upper and lower control limits?
A)22 and 18
B)23.29 and 16.71
C)23.5 and 16.5
D)23.16 and 16.84
E)24 and 16

Question

A quality analyst wants to construct a control chart for determining whether three machines, all producing the same product, are in control with regard to a particular quality variable. Accordingly, he sampled four units of output from each machine, with the following results

What are the x-bar chart three-sigma upper and lower control limits?

What are the x-bar chart three-sigma upper and lower control limits?
A)22 and 18 
B)23.29 and 16.71 
C)23.5 and 16.5 
D)23.16 and 16.84 
E)24 and 16

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 in control with regard to a particular quality variable. Accordingly, he sampled four units of output from each machine, with the following results

What are the x-bar chart three-sigma upper and lower control limits?
A)22 and 18 
B)23.29 and 16.71 
C)23.5 and 16.5 
D)23.16 and 16.84 
E)24 and 16

A Quality Analyst Wants to Construct a Control Chart for Determining