Question: Need help solving the orange boxes An article in Concrete Research (Near Surface Characteristics of Concrete: Intrinsic Permeability, Vol. 41,1989), presented data on compressive strength

Need help solving the orange boxes

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, [ y: = 572, [ y? = 23530, [ xi = 43, Ex? = 157.42, and _My; = 1697.80. Assume that the two variables are related according to the simple linear regression model. Round your answers to 2 decimal places. Find a 99.00% confidence interval on each of the following: (a) Intercept. ! (b) Slope. i ! i (c) Mean permeability when x = 3.6. 39.62 (d) Find a 99.00% prediction interval on permeability when x = 3.6. ! Statistical Tables and Charts

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