You work for a parts manufacturing company and are tasked with exploring the wear lifetime of a certain bearing. You gather data on oil viscosity used and load. You see the regression output given below. What is the correct conclusion about the regression slopes based solely on the F-test? Predictor Coef Stdev t-ratio P Constant -147.973 41.972 -3.53 0. 004181 viscosity 6.262 0. 474 13.21