An express delivery service company recently conducted a study to investigate the relationship between the cost of shipping a package (Y), the package weight(X1), and the distance shipped (X2) . Twenty packages were randomly selected from among the large number received for shipment, and a detailed analysis of the shipping cost was conducted for each package.Table below reports the simple linear regression analysis involving shipping cost and package weight:

Multiple Adjusted StErr of R-Square summary R R-Square Estimate 0. 7736 0. 5985 0. 5761 3.175711247 Degrees of Sum of Mean of F-Rat lo p-Value ANDYA Joble Freedom Squares Squares Explained 1 270.5529453 270.5529453 26. 8269