To measure the e!ectiveness of government training programs, it is usual to compare workers' pa many workers sign up for training when their pay drops or they are laid o!. So the "before" pay is gain looks large. Is this bias or random error in measuring the e!ect of a training on pay? What is a valid way to training programs? Select all answers that apply. Measure the success of a training program through a test that measures skills before and aft This is random error because the pay gain after training could vary for an individual. This is random error because it is always understating the e!ect of the government training This is bias because it is always overstating the e!ect of the government training programs. Measure the success of the training program by comparing the number of hours of work pe before and after training