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Control Chart Wizard - Average And Standard Deviation
 |  | | Control Chart Suggestion: Average And Standard Deviation - X-Bar and s | | | | | | | |
| Control Chart Description |
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If the sample size is relatively large (e.g., greater than 10-15), the sample standard deviation (s, sigma or s) is a more efficient indicator of process variability. It is typically more difficult to calculate and is less sensitive in detecting special causes of variation that cause only a single value in a subgroup to be unusual. The average and standard deviation control chart is used with continuous/variable data when subgroup or sample size is greater than 10-15.
Table Of Constants
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