The article "Effect of Granular Subbase Thickness on Airfield Pavement StructuralResponse" (K. Gopalakrishnan and M. Thompson, Journal of Materials in CivilEngineering, 2008:331-342) presents a study of the amount of surface deflection caused byaircraft landing on an airport runway. A load of 160 kN was applied to a runway surface,and the amount of deflection in mm (y) was measured at various distances in m (x) from thepoint of application. The results are presented in the following table.y0.0003.240.3052.360.6101.420.9140.871.2190.541.5240.341.8300.24a.Fit the linear model y = Bo + B1x + ɛ. For each coefficient, test the hypothesis that thecoefficient is equal to 0.b. Fit the quadratic model y = Bo + Bịx + B2x² + ɛ. For each coefficient, test the hypothesisthat the coefficient is equal to 0.%3DFit the cubic model y = Bo + B1x +B2x? + B3x + E. For each coefficient, test theC.hypothesis that the coefficient is equal to 0.d.Which of the models in parts (a) through (c) is the most appropriate? Explain.e.Using the most appropriate model, estimate the deflection at a distance of 1 m.

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MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Wild irises are beautiful flowers found throughout the United States, Canada, and northern Europe. This problem concerns the length of the sepal (leaf-like part covering the flower) of different species of wild iris. Data are based on information taken from an article by R. A. Fisher in Annals of Eugenics (Vol. 7, part 2, pp. 179 -188). Measurements of sepal length in centimeters from random samples of Iris setosa (I), Iris versicolor (II), and Iris virginica (III) are as follows below. I II III 5.9 5.8 6.9 4.8 6.5 5.6 4.6 6.4 4.9 5.7 4.3 7.7 4.8 5.8 5.6 5.4 6.3 6.3 5.8 5.5 6.6 Shall we reject or not reject the claim that there are no differences among the population means of sepal length for the different species of iris? Use a 5% level of significance. (b) Find SSTOT, SSBET, and SSW and check that SSTOT = SSBET + SSW. (Use 3 decimal places.) SSTOT = SSBET = SSW = Find d.f.BET, d.f.W, MSBET, and MSW. (Use 4 decimal places for MSBET, and…
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