How to Make an Individuals Control in MS Excel 2007

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 Individuals Control Chart (or I-Chart) can help determine if the process of gas use is stable (with respect to mean level). If any points exceed the control limits, we conclude the process is not stable.

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