A plot in the article “Thermal Conductivity of Polyethylene: The Effects of Crystal Size, Density, and Orientation on the Thermal Conductivity” (Polymer Engr. and Science, 1972: 204–208) suggests that the expected value of thermal conductivity y is a linear function of 104 .1/x, where x is lamellar thickness.
a. Estimate the parameters of the regression function and the regression function itself.
b. Predict the value of thermal conductivity when lamellar thickness is 500 Å.
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