STICS FINAL EXAM (page 16 of 27) - Google Chrome d/quiz/attempt.php?attempt=74766&cmid=149163&page=15 5 c A researcher is trying to decide whether or not to add another variable to his model. He has estimated the following model from a sample of 28 observations. See the data in figure. Using P-value approach make a conclusion to take a business decision. Y=23.62+18.86X, +24.72X, SSR = 1.326 He has also estimated the model with an additional variable Xr. The results are Y=25.32+15.29X,*7.63X,#12 72X, SST = 2,751 SSR = 1451 a Since F. (2.308) is less than Fcritical (4.26), we do not reject Ho So use the restricted model. b. Since F (2.208) is less than Fcritical (4.21), we do not reject Ho So use the restricted model O c. Since F (2.308) is less than Fcritical (4.26), we do not reject Ho So use the unrestricted model. V2 to search O W