Reaeration. The data below are from an experiment that attempted to relate the rate of disso- lution of an organic chemical to the reaeration rate (y) in a laboratory model stream channel. The three experimental factors are stream velocity (V, in m/sec), stream depth (D, in cm), and channel roughness (R). Calculate the main effects and interactions and interpret the results. Run V D R y (Triplicates) Average 10 10 1 2 3 4 5 6 7 8 0.25 0.5 0.25 0.5 0.25 0.5 0.25 0.5 15 15 10 10 15 15 Smooth Smooth Smooth Smooth Coarse Coarse Coarse Coarse 107 190 119 188 119 187 140 164 117 178 116 191 132 173 133 145 117 179 133 195 126 166 132 144 113.7 182.3 122.7 191.3 125.7 175.3 135.0 151.0 *Note, to interpret results quantitatively, construct 95% confidence intervals for main effects and interactions and draw your conclusions. Reaeration. The data below are from an experiment that attempted to relate the rate of disso- lution of an organic chemical to the reaeration rate (y) in a laboratory model stream channel. The three experimental factors are stream velocity (V, in m/sec), stream depth (D, in cm), and channel roughness (R). Calculate the main effects and interactions and interpret the results. Run V D R y (Triplicates) Average 10 10 1 2 3 4 5 6 7 8 0.25 0.5 0.25 0.5 0.25 0.5 0.25 0.5 15 15 10 10 15 15 Smooth Smooth Smooth Smooth Coarse Coarse Coarse Coarse 107 190 119 188 119 187 140 164 117 178 116 191 132 173 133 145 117 179 133 195 126 166 132 144 113.7 182.3 122.7 191.3 125.7 175.3 135.0 151.0 *Note, to interpret results quantitatively, construct 95% confidence intervals for main effects and interactions and draw your conclusions