Question: studies on a machine that molds plastic water pipe indicate...
Studies on a machine that molds plastic water pipe indicate that when it is manufacturing 1-inch diameter pipe, the process mean turns out to be 0.9 inches and the process standard deviation is 0.04 inches. The customers define a good quality pipe as one having a diameter of one-inch with a tolerance of plus or minus 0.20 inch. What level of quality does the process currently deliver?
|None of the above|