A manufacturer of computer terminals claims its products will last at least 2000 hours without needing repairs. Data Incorporated is considering purchasing a great many of their computer terminals. Before agreeing to buy the manager of Data, Inc. randomly selected a sample of 81 records of the manufacturer's terminals. The average time before the first breakdown was 1,980 hours with a standard deviation of 120 hours. What conclusion should the manager reached at the 5% level of significance?