Using a value of 0.729 for the A₂ lookup from Table 5.1 yields:
UCL = 24.6 + 0.729*5.73 = 28.8
LCL = 24.6 - .729*5.73 = 20.4

The chart is in control.
-A professor records the number of students who complain each week throughout the semester. If the class size is forty students, what are 3-sigma control limits for this class? Construct a control chart and interpret the data.

Question

Using a value of 0.729 for the A₂ lookup from Table 5.1 yields:
UCL = 24.6 + 0.729*5.73 = 28.8
LCL = 24.6 - .729*5.73 = 20.4
  
The chart is in control.
-A professor records the number of students who complain each week throughout the semester. If the class size is forty students, what are 3-sigma control limits for this class? Construct a control chart and interpret the data.

Quizplus · Accepted Answer

The Answer of Using a value of 0.729 for the A₂ lookup from Table 5.1 yields:
UCL = 24.6 + 0.729*5.73 = 28.8
LCL = 24.6 - .729*5.73 = 20.4
  
The chart is in control.
-A professor records the number of students who complain each week throughout the semester. If the class size is forty students, what are 3-sigma control limits for this class? Construct a control chart and interpret the data.

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