The personnel director for Electronics Associates developed the following estimated regression equation relating an emplovee's score on a job satisfaction test to his or her length of service and wage rate. g; = 14.4 3.6921 + 13.5w: w here 31 = length of service {years} 952 = wage rate {dollars} 1" = job satisfaction test score [higher scores indicate greater job satisfaction] Round your answers to 2 decimal places. a. Interpret the coefcients in this estimated regression equation. If the wage rate does not change, a one vear increase in length of service is associated with in job satisfaction score bv ' units. If the length of service does not change, a dollar increase in wage results in in job satisfaction score bv iunits. h. Predict the job satisfaction test score for an emplovee who has four vears of service and makes 33.50 per hour