12.114 Supply chain management performance. The leadership characteristics of supply chain managers were investi- gated in the Journal of the International Academy for Case Studies (Vol. 26, 2020). Each in a sample of 82 supply chain managers completed a questionnaire on management leadership style. The dependent variable in the study was supply chain management performance (y), an aggregate of several performance metrics. Five inde- pendent variables were considered as possible predictors of performance: idealized influence behavior (x1), ideal- ized influence attributed (x2), individualized consider- ation (x3), inspirational motivation (x4), and intellectual stimulation (x5). A stepwise regression was run with all 5 independent variables. a. In step 1 of the stepwise regression, how many differ- ent one-variable models are fit to the data? b. In step 1, the variable individualized consideration (x3) is selected as the best one-variable predictor. How is this determined? c. In step 2 of the stepwise regression, how many differ- ent two-variable models (where x3 is one of the vari- ables) are fit to the data? d. Ultimately, the only variable selected for entry into the stepwise regression model is x3. The stepwise re- gression yielded the following results: R = .178, 3= .282, t = 4.19 (p-value < .01) The researchers concluded that "supply chain leaders with higher levels of individual consideration toward members of supply chains typically obtain better chain performance than leaders who do not exhibit higher levels of individual consideration." Do you agree with this interpretation? e. The researchers also stated that, based on the value of R2, "leaders who demonstrated individual consid- eration traits obtain 18% better supply chain manage- ment results than leaders who do not demonstrate individual consideration." Do you agree with this interpretation?