On top of the vegetables list are cucumber and lettuce, consisting of 96 percent water. Zucchini, radish and celery are comprised of 95 percent water. Ninety-four percent of tomato's weight is water, and green cabbage is 93 percent water.
I looked at the process sigma calculator (button in upper right below the search box) and they present a link to a forum post (http://www.isixsigma.com/forum/showmessage.asp?messageID=437) that gives information on calculating the sigma using a normsinv function.
What Is Six Sigma Green Belt? Six Sigma is a process improvement method that was developed at Motorola. The Six Sigma approach to continuous improvement focuses on reducing errors and increasing customer satisfaction. Six Sigma is highly adaptable across business environments, and it has proven popular in various industries. Six Sigma Green Belt training introduces an overview of the key concepts necessary to be a successful member of a Six Sigma project team.