16 Required Information Part1 of4 Structural engineers use wireless sensor networks to monitor the condition of dams and bridges. An article describes an .- experiment in which accelerometers were placed on the Golden Gate Bridge for the purpose of estimating vibration modes. The following output (from MINITAB) describes the t of a linear model that predicts the frequency (in Hz) in terms 2 85 of the damping ratio for over damped (damping ratio >1) modes. There are n = 7 observations points The regression equation is Frequency = 0.773 0.280 Damping Ratio Predictor Coef SE Coef T P Constant 0.77289 0.14534 5.3176 0.003 Damping Ratio 0 27985 0.079258 3.5309 0.017 How many degrees of freedom are there for the Student's tstatistics