The amount of mineral water filled in 2-liter bottles by an automatic bottling machine is monitored using a control chart. The actual contents of random samples of 4 bottles collected on 8 different days are tabulated below. Draw X-bar, R, and s charts. Is the process in control? If it is not, remove the sample that is out of control, and redraw the charts.
Answer to relevant QuestionsA battery manufacturer looks at samples of 30 batteries at the end of every day of production and notes the number of defective batteries. Results are 1, 1, 0, 0, 1, 2, 0, 1, 0, 0, 2, 5, 0, 1. Is the production process under ...Use the data to create an x̄ chart to test whether the process mean is under control. 2.5, 2.66, 2.8, 2.3, 2.5, 2.33, 2.41, 2.88, 2.54, 2.11, 2.26, 2.3, 2.41, 2.44, 2.17, 2.52, 2.55, 2.38, 2.89, 2.9, 2.11, 2.12, 2.13, 2.16 The errors in the inventory records of a company were analyzed for their causes. The findings were 164 cases of omissions, 103 cases of wrong quantity entered, 45 cases of wrong part numbers entered, 24 cases of wrong dates ...Rolls Royce makes the Trent 900 jet engines used in the new Airbus A380 planes, and needs to control the maximum thrust delivered by the engines. The following are readings related to power for successive engines ...Explain when you would use the Mann-Whitney test, when you would use the two-sample t test, and when you would use the Wald-Wolfowitz test. Discuss your reasons for choosing each test in the appropriate situation.
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