The accompanying data was read from a graph that appearedin the article Reactions on
Chapter 12, Problem 24(choose chapter or problem)
The accompanying data was read from a graph that appearedin the article Reactions on Painted Steel Under theInfluence of Sodium Chloride, and Combinations Thereof(Ind. Engr. Chem. Prod. Res. Dev., 1985: 375378). Theindependent variable is SO2 deposition rate (mg/m2/d), andthe dependent variable is steel weight loss (g/m2).a. Construct a scatter plot. Does the simple linear regressionmodel appear to be reasonable in this situation?b. Calculate the equation of the estimated regression line.c. What percentage of observed variation in steel weightloss can be attributed to the model relationship in combinationwith variation in deposition rate?d. Because the largest x value in the sample greatlyexceeds the others, this observation may have been veryinfluential in determining the equation of the estimatedline. Delete this observation and recalculate the equation.Does the new equation appear to differ substantiallyfrom the original one (you might considerpredicted values)?
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