An article presented data on compressive strength x and intrinsic permeability y of various concrete mixes and cures. Summary quantities are , , , , , and . Assume that the two variables are related according to the simple linear regression model. Round your answers to 3 decimal places. (a) Test for significance of regression using . Choose your answer in accordance to the item a) of the question statement Reject the null hypothesis. (b) Estimate . Enter your answer in accordance to the item b) of the question statement . (c) In this model, what is the standard error of the intercept