# Exercises 9-12 refer to the following table which lists carbon dioxide concentrations (in parts per million) for each year from 1880 to 2009 with projection values for the last four years. Construct a run chart for the 130 values. Does there appear to be a pattern suggesting that the process is not within statistical control? What are the practical implications

Exercises 9-12 refer to the following table which lists carbon dioxide concentrations (in parts per million) for each year from 1880 to 2009 with projection values for the last four years. Construct a run chart for the 130 values. Does there appear to be a pattern suggesting that the process is not within statistical control? What are the practical implications of the run chart?

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