a sample of 900900 computer chips revealed that 63c% of the chips fail in the first 10001000 hours of their use. the company's promotional literature states that 60`% of the chips fail in the first 10001000 hours of their use. the quality control manager wants to test the claim that the actual percentage that fail is different from the stated percentage. is there enough evidence at the 0.050.05 level to support the manager's claim?
