Repair Time Months Since in Hours Last Service Type of Repair Repairperson 2.9 Electrical Dave Newton 2.9 Mechanical Dave Newton 4.8 Electrical Bob Jones 1.8 Mechanical Dave Newton 2.8 Electrical Dave Newton A CO ID N W O Or N 4.8 Electrical Bob Jones 4.2 Mechanical Bob Jones 4.9 Mechanical Bob Jones 4.5 Electrical Bob Jones 4.6 6 Electrical Dave Newton a. Develop the estimated regression equation to predict the repair time given the number of months since the last maintenance service, the type of repair, and the repairperson who performed the service. Assume that 2 = 1 if the type of repair is electrical and $3 = 1 if Dave Newton performed the service. Enter negative value as negative number. Time = bo + bj Months + b2 Type + b3 Person Round your answers to three decimal places. bo b1 b2 b3 Xb. At the 0.05 level of significance, test whether the estimated regression equation developed in part (a) represents a significant relationship between the independent variables and the dependent variable. Compute F test statistic (to 2 decimals).c. Is the addition of the independent variable 23, the repairperson who performed the service, statistically significant? Use a = 0.05. Compute the t test statistic for the significance of 23 (to 2 decimals). Enter negative value as negative number