5.28 Strategic risk taking. Refer to the Academy of Management Journal (December 2015) study of the influence of CEO social class background on a company's level of strategic risk taking, Exercise 5.3 (p. 272). Consider using the qualita- tive variable, CEO social class origin, as a predic tor of strategic risk taking (). Suppose that three social class levels were studied: Lower, Middle, and Upper class. (a) Write a model for E(y) as a function of social class origin at three levels. (b) Interpret the parameters in the model. (c) Explain how to test for differences among the risk-taking means for the four social class origin levels. 5.28 Strategic risk taking. Refer to the Academy of Management Journal (December 2015) study of the influence of CEO social class background on a company's level of strategic risk taking, Exercise 5.3 (p. 272). Consider using the qualita- tive variable, CEO social class origin, as a predic tor of strategic risk taking (). Suppose that three social class levels were studied: Lower, Middle, and Upper class. (a) Write a model for E(y) as a function of social class origin at three levels. (b) Interpret the parameters in the model. (c) Explain how to test for differences among the risk-taking means for the four social class origin levels