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Control Chart Wizard - Average And Range
 |  | | Control Chart Suggestion: Average And Range - X-Bar and R | | | | | | | |
| Control Chart Description |
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If the sample size is relatively small (e.g., less than 10-15), we can use the range instead of the standard deviation of a sample to construct control charts on X-Bar (arithmetic mean) and the range, R. The range of a sample is simply the difference between the largest and smallest observation. The X-bar and R control chart is used with continuous/variable data when subgroup or sample size is between 2 and 15.
Table Of Constants
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