Given the following process control data for a normally distributed quality variable (three samples of size four each):
If the process is known to have a mean of 15 and a standard deviation of 3,what are the three sigma upper and lower control limits for an x-bar chart?

Question

Given the following process control data for a normally distributed quality variable (three samples of size four each):
  If the process is known to have a mean of 15 and a standard deviation of 3,what are the three sigma upper and lower control limits for an x-bar chart?

Quizplus · Accepted Answer

The Answer of Given the following process control data for a normally distributed quality variable (three samples of size four each):
  If the process is known to have a mean of 15 and a standard deviation of 3,what are the three sigma upper and lower control limits for an x-bar chart?

Given the Following Process Control Data for a Normally Distributed