A Manager Wants to Build 3-Sigma Control Limits for a Process

Multiple Choice

A manager wants to build 3-sigma 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, the UCL and LCL will be

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