A Six Sigma Green Belt wants to analyze four factors, at two levels each, one factor at a time. What is the impact on the type I error?

OPTIONS

A. A type I error improves with each individual analysis
B. Interactions are clearly determined
C. A type I error increases with each individual analysis
D. The optimum combination of factors is revealed

A type I error increases with each individual analysis

Explanation:

With each single comparison, more errors are introduced. Even if a proper confidence interval is used for every individual test, the total confidence interval decreases, and consequently the type I error increases.