What were the conclusions drawn by the statistical consultants using the R-chart?

dextersim97

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6 years ago

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curly

wrote...

6 years ago

The consultants examined the R-chart along with the x-chart. The last 14 points of R were all on one side of the center line, indicating a lack of statistical control. Careful examination revealed that the points of R were below the center and were indicating that the overall variation had been reduced by what the maintenance technician had done. Yet, in reading the x-chart (after examining the R-chart), the length of the syringes seemed to have increased.

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