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1.Table below shows salaries for 25 employees in the advertising department at Apple Tree, Ltd. As an initial step in a salary equity study, the human resources consultant performed a linear regression using the proposed model Salary = ₀+ ₁ Male + ₂ Exper + ₃ Ovr50 + ₄ MBA. Exper is the employee's experience in years. Salary is in thousands of dollars. Binaries are used for gender (Male = 0, 1 -- 1 if employee is male), age (Ovr50 = 0, 1 - 1 if employee's age is over 50), and MBA degree (MBA = 0, 1 --1 if employee has an MBA degree).

Sales of Advertising department Employees at Apple Tree, Ltd. Employee Salary Male Exper Ovr50 MBA Mary 28.6 Frieda 53.3 Alicia 73.8 Tom 26.0 Nicole 77.5 Xihong 95.1 Ellen 34.3 Bob 63.5 HOHOHOHOHOHOOO Vivian 96.4 Cecil 122.9 Barry 63.8 Jaime 111.1 Wanda 82.5 O O O O O O O O H O O O H O O O O O H O O O O H H Sam 80.4 Saundra 69.3 Pete 52.8 Steve 54.0 Juan 58.7 Dick 72.3 Lee 88.6 Judd 60.2 Sunil 61.0 Marcia 75.8 HOOK Vivian 79.8 Igor 70.2