Chemical engineers at Tokyo Metropolitan University analyzed urban air specimens for the presence of low molecular weight dicarboxylic acid (Environmental Science & Engineering, Oct. 1993). The dicarboxylic acid (as a percent of total carbon) and oxidant concentrations for 19 air specimens collected from urban Tokyo are listed in the table on below. Consider a straight line model relating dicarboxylic acid percentage (y) to oxidant concentration (x). Conduct a complete residual analysis.

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URBANAIR Dicarboxylic Acid % oxidant Dicarboxylic Acid % Oxidant ppm ppm .85 78 50 32 1.45 80 .38 28 1.80 74 30 25 1.80 78 70 45 1.60 60 80 40 1.20 62 .90 45 1.30 57 1.22 41 .20 49 1.00 34 22 34 1.00 25 40 36