Instead of one observation outside of 3σ from the mean as in Exercise 17, suppose a quality control engineer decides to use only the run chart rule that the system is out of control if 8 observations in a row lie on the same side of the mean. What is the probability that this would happen based on random chance variation alone? What assumptions do you have to make to answer this?
Answer to relevant QuestionsA company that makes basketballs has the motto: “Our basketballs are ready to play.” Therefore, it is important to the company that the basketballs are inflated with the proper amount of air when shipped. Most ...The following data are from a production process that makes 250 units each hour. The data were collected over a normal 12-hour shift one day. The data are shown in the table at the right. Using the first 10 hours as the ...For the data in Exercise 1, instead of the specification limits, a) Use the historical standard deviation to set up 1, 2, and 3s limits and draw the control chart. b) Are any points outside the 3s limits on either ...Consumers always seem to want thinner and lighter electronic products, and computer laptops are no exception. One of the challenges of producing extremely thin and light laptops is the manufacturing of the touch pads. In ...The table gives the names, dates first awarded, and heights (inches) of major trophies and awards in sports and entertainment. The America's Cup, awarded for sailing, claims to be the oldest such award. The first five were ...
Post your question