An article in Concrete Research ("Near Surface Characteristics of Concrete: Intrinsic Permeability," Vol. 41, 1989), presented data on compressive strength x and intrinsic permeability y of various concrete mixes and cures. Summary quantities are n = 14, Σy = 572, Σv = 23,530, Σ.x, = 43, Σ. x = 157.42, and Ex,y, = 1697.80. Assume that the two variables are related according to the simple linear regression model. Correct. Calculate the least squares estimate of the slope. (Round your answer to 3 decimal places.) -2.330 Correct. Calculate the least squares estimate of the intercept. (Round your answer to 3 decimal places.) 48.014 Correct. Statistical Tables and Charts Use the equation of the fitted line to predict what permeability would be observed when the compressive strength is x = 4.3. (Round your answer to 2 decimal places.) 38.00 Give a point estimate of the mean permeability when compressive strength is x = 3.7. (Round your answer to 2 decimal places.) i

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