Sample size is the mathematical estimation of the # of population units for a study. Sample size must be adequate to represent the population.

Selecting Six Sigma projects is critical for project success. Project selection should be based on objective data and to be quantifiable.

One of the primary tasks in Six Sigma project implementation is to define the appropriate project management metrics.

How to define a process is one of the critical aspects, as this is the basis for identifying the improvement project or problem-solving projects.

wo Sample Z Hypothesis Tests is a parametric test is to compare the means of two independent groups of samples drawn from a normal population.