As Director of the Employee Wellness and Productivity Program in Your

As director of the employee wellness and productivity program in your company, you are interested in comparing the effects of strength training, aerobic training, and yoga on decreasing rates of injury and absenteeism.The company has 9 divisions with roughly the same number of employees, and you randomly assign 3 divisions to participate in strength training, 3 to aerobic training, and 3 to yoga.Your null hypothesis is ______.

A) $\mu$ ₁ $\neq$$\mu$ ₂ $\neq$ $\mu$ ₃
B) $\mu$ ₁ $\ge$ $\mu$ ₂ $\ge$ $\mu$ ₃
C) $\mu$ ₁ $\le$ $\mu$ ₂ $\le$$\mu$ ₃
D) $\mu$ ₁ = $\mu$ ₂ = $\mu$ ₃
E) $\mu$ ₁ $\le$$\mu$ ₂ ≥ $\mu$ ₃