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.
A sigma-blade mixer is used to manufacture Silly Putty. Raw materials are placed into the mixing bowl and blended together for half an hour. Once mixed, the machine operator tilts the mixing bowl and removes the material onto a cart. From there, the Silly Putty is cut and packaged.