Home » Certification Exams Questions » Find the Control limits for the Averages charts

The mean of Ranges of a process sample collected across 20 samples is 6, and the mean of averages is 10 with the sample size of 8 per sample. The Control limits for the Averages charts are

OPTIONS

  • 6,14
  • 7, 13
  • 7.76, 12.24
  • 8.1, 11.9

ANSWER

7.76, 12.24

EXPLANATION

Using Control Chart constants, the Control limits for the Averages charts are 7.76, 12.24.

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