A healthcare executive is using regression to predict total revenues. She is deciding whether or not to include both patient length of stay and insurance type in her model. Her first regression model only included patient length of stay
The resulting r2 was .83, with an adjusted r2 of .82 and her level of significance was .003. In the second model, she included both patient length of stay and insurance type. The r2 was .84 and the adjusted r2 was .80 for the second model and the level of significance did not change. Which of the following statements is true?
A) The second model is a better model.
B) The first model is a better model.
C) The r2 increased when additional variables were added because these variables significantly contribute to the prediction of total revenues.
D) The adjusted r2 always increases when additional variables are added to the model.
E) None of the above statements are true.
B
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Which of the following is typically a characteristic of an organic model of organization?
A) narrow spans of control B) centralization C) free flow of information D) high formalization E) inflexibility
DynaTech's chief marketing officer argues that becoming an international company is an unwarranted move for DynaTech because it does not have to do so to maintain superiority over its competition
Which of the following, if true, most weakens his argument? A) DynaTech's profits have been increasing for many years. B) Globalization has been an ever-increasing trend for the largest companies. C) The competitive environment in other countries in DynaTech's business is stiffer than in the United States. D) Many companies succeed internationally after taking the initiative to globalize. E) The process of globalization for a company can be complicated by international commerce laws.