Regression methods were used to analyze the data from a study investigating the lationship between compressive strength (x) and intrinsic permeability (y) of various oncrete mixes and cures. Summary quantities were n=20, E y;-572, E y?=23,530, x;=43, Ex?=157.42 and E x; y;=1697.80. ) Calculate the least squares estimates of the slope and intercept. -) Estimate o?. ) Suppose that the observed value of permeability at x=3.5 is y=41. Calculate the value the corresponding residual. Consider the following computer output: nalysis of Variance Source df SS MS F n-value

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