Chemists at Kyushu University (Japan) examined the linear relationship between the maximum absorption rate y (in nanomoles) and the Hammett substituent constant x for metacyclophane compounds (Journal of Organic Chemistry, July 1995). The data for variants of two compounds are given in the accompanying table and saved in the ORGCHEM file. The variants of compound 1 are labeled 1a, 1b, 1d, 1e, 1f, 1g, and 1h; the variants of compound 2 are 2a, 2b, 2c, and 2d.

a. Plot the data in a scatterplot. Use two different plotting symbols for the two compounds. What do you observe?
b. Using only the data for compound 1, fit the model
E(y) = β0 + β1x.
c. Assess the adequacy of the model you fit in part b. Use α = .01.
d. Repeat parts b and c, using only the data for com pound 2.

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Maximum Absorption y 298 346 303 314 302 332 302 343 367 325 331 Hammett Constant x Compound 1a lb 1d 0.00 75 06 -.26 .18 .42 -.19 52 1.01 37 53 1g 1h 2a 2b 2d