An engineer at a semiconductor company wants to model the re
     An engineer at a semiconductor company wants to model the relationship between the device HFE (y) and the parameter Emitter - RS ( ). Data for EmiXpr - RS was first collected and a statistical analysis is carried out and the output is displayed in the table given.  Estimate HFE when the Emitter - RS is 14.5.  Obtain a 95 % confidence interval for the true slope.  Test for significance of regression for a = 0.05.  
  
  Solution

