Question
Asked Jan 18, 2020
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Cola Cans In each of several consecutive days of production of cola cans, 50 cans are tested and the numbers of defects each day are listed below. Do the proportions of defects appear to be acceptable? What action should be taken?

8 7 9 8 10 6 5 7 9 12 9 6
7 9 8 11
10 9 7
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8 7 9 8 10 6 5 7 9 12 9 6 7 9 8 11 10 9 7

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Expert Answer

Step 1

Requirements for out-of-control state:

A process is said to be out-of-statistical control if any one of the following requirements are satisfied:

  • There exists an upward or downward trend or a cyclic pattern.
  • If a sample point lies below the lower control limit or above the upper control limit.
  • There exists at least 8 consecutive sample points above or below the central line. It is known as Run Rule ...
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