In a study of crop losses due to air pollution, plots of Blue Lake snap beans were grown in open-top field chambers, which were fumigated with various concentrations of sulfur dioxide. After a month of fumigation, the plants were harvested, and the total yield of bean pods was recorded for each chamber. The results are shown in the table.34

Preliminary calculations yield the following results.
= 0.12 = 1.117 SX = 0.11724 SY = 0.31175 r = -0.8506 SS(resid) = 0.2955
(a) Calculate the linear regression of Y on X.
(b) Plot the data and draw the regression line on your graph.
(c) Calculate se. What are the units of .v,,?

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X-Sulfur dioxide concentration (ppm) 0.06 0.120.30 1.19 1.21 0.65 Y-yield (kg) 130 64 1.000.76 157113 069 132 L11 0.70 0 .1S Mean 134