Wocaf Drinks, Inc., a producer of coffee, boat Nocaf. Each bottle has a net weight of 4 ounces. The bottling machine is new, and the operations manager wants to ensure that it is properly adjusted. The operations manager randomly selects and weighs n = 8 bottles and records the average range in ounces for each sample. The data for several samples is given in the following table. Note that every sample consists of 8 bottles. Is the machine properly adjusted and in control?

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Sample A B C D E F G H Sample Range 0.41 0.55 0.44 0.48 0.56 0.62 0.54 0.44 Sample Average 4.00 4.16 3.99 4.00 4.17 3.93 3.98 4.01 Sample A B C D E F G H Sample Range 0.41 0.55 0.44 0.48 0.56 0.62 0.54 0.44 Sample Average 4.00 4.16 3.99 4.00 4.17 3.93 3.98 4.01

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We plot Xbar and R chart to determine whether the process is in c... View the full answer