In Reality,on the Basis of Computations,a Six Sigma Process Quality

Multiple Choice

In reality,on the basis of computations,a Six Sigma process quality level is equivalent to the LTL and the UTL's being how many standard deviations away from the extreme position of the mean?

A) 1.5 standard deviations
B) 3 standard deviations
C) 4.5 standard deviations
D) 6 standard deviations
E) 12 standard deviations