A Manager Wants to Build 3-Sigma X-Bar Control Limits for a Process.The

Multiple Choice

A manager wants to build 3-sigma x-bar control limits for a process.The target value for the mean of the process is 10 units,and the standard deviation of the process is 6.If samples of size 9 are to be taken,what will be the upper and lower control limits,respectively?

A) -8 and 28
B) 16 and 4
C) 12 and 8
D) 4 and 16
E) 8 and 12