The following estimated regression equation relating sales to inventory investment and advertising expenditures was given. ŷ = 29 + 13x, + 9×2 The data used to develop the model came from a survey of...

5

Extracted text: The following estimated regression equation relating sales to inventory investment and advertising expenditures was given. ŷ = 29 + 13x, + 9×2 The data used to develop the model came from a survey of 10 stores; for those data, SST = 17,000 and SSR = 13,430. (a) For the estimated regression equation given, compute R². R2 = 2 (b) Compute R. (Round your answer to two decimal places.) 2 Ra (c) Does the model appear to explain a large amount of variability in the data? Explain. (For purposes of this exercise, consider an amount large if it is at least 55%. Round your answer to the nearest integer.) The adjusted coefficient of determination shows that % of the variability has been explained by the two independent variables; thus, we conclude that the mode ---Select--- lain a large amount of variability. does does not