Luis and Margo are both candidates for a housekeeping job at a major hotel. The selection process includes having applicants demonstrate their ability to clean a room quickly. The work sample is graded by a housekeeping supervisor. Margo was turned down for the job because she scored below 70 on the assessment. The hotel requires all employees to be retested every year and Margo knows that two of her cousins who work for the hotel get scores that vary significantly from year to year, depending on the supervisor doing the scoring. Margo contends that this employment test does not seem to have ______________.