17 Part20f4 2.85 points Required Information 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 of the damping ratio for over damped (damping ratio >1) modes. There are n = 7 observations 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 Find a 98% confidence interval for B1. Round the answers to three decimal places. The 98% condence interval for 31 is (|:| , |:| )