Consider the simple linear regression model fit to the toluene-tetralin viscosity data in Problem 2.15.

Problem 2.15

Byers and Williams ("Viscosities of Binary and Ternary Mixtures of Polynomatic Hydrocarbons," Journal of Chemical and Engineering Data, 32, 349-354, 1987) studied the impact of temperature on the viscosity of toluenetetralin blends. The following table gives the data for blends with a 0.4 molar fraction of toluene.

a. Construct a normal probability plot of the residuals. Does there seem to be any problem with the normality assumption?

b. Construct and interpret a plot of the residuals versus the predicted response.

Transcribed Image Text:

Temperature (C) Viscosity (mPas) 24.9 1.1330 35.0 0.9772 44.9 0.8532 55.1 0.7550 65.2 0.6723 75.2 0.6021 85.2 0.5420 95.2 0.5074