How to Make a Moving Range Control Chart in MS Excel 2007

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Uploaded by on Sep 21, 2010

The time-series data I analyzed in the video is gas use data (in 100s of cubic feet) of natural gas used at my home on a daily basis over a period of 30 consecutive days. The Moving Range Control Chart (or MR-Chart) can help determine if the process of gas use is stable (with respect to short-term variability). If any points exceed the upper control limit, we conclude the process is not stable. We plot moving ranges rather than original series values to monitor the changes from one time period to the next.

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  • beautiful...

    

  • tnx . . it helped me . . ^_^

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