The phrase Six Sigma has two meanings. One is statistical, referring to an extremely high process capability; the other is a comprehensive system for achieving and sustaining business success.

a. True.
b. False.

true  

Explanation:

In the subject matter of statistics, six sigma refers to the group of tools and techniques which are used by statistician, while performing some analysis, to improve its process. In simple words,Under the six sigma technique almost all of the inputs of the analysis are assumed to be free of any defects.

    While on the other hand six sigma refers to the system by using which a business can be improve its processes and operations at a substantial level. Thus we can conclude that the given statement is true.