The article The Undrained Strength of Some Thawed

Chapter 0, Problem 14.27

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The article The Undrained Strength of Some Thawed Permafrost Soils (Canadian Geotechnical Journal [1979]: 420427) contained the accompanying data (see page 778) on y shear strength of sandy soil (kPa), x1 depth (m), and x2 water content (%). The predicted values and residuals were computed using the estimated regression equation where , , and .a. Use the given information to compute SSResid, SSTo, and SSRegr. b. Calculate R2 for this regression model. How would you interpret this value? c. Use the value of R2 from Part (b) and a .05 level of significance to conduct the appropriate model utility test.

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