The correct answer is that 43.32 percent of data is included in +/- 1.5 Sigma, which is answer choice A. This is a common question that is found on the online professional certification for Six Sigma yellow belt. We have a section for these commonly asked questions where we have answered everything you may want or need to know about the Six Sigma yellow belt certification.
Another example question is: what can be measured against a benchmark in a process? To find the answer to this and many other questions, check out our section on Six Sigma yellow belt.