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[All Steps] In tests of a computer component, it is found that the mean time between failures is 520 hours. A modification is made which is supposed to increase

Question: In tests of a computer component, it is found that the mean time between failures is 520 hours. A modification is made which is supposed to increase the time between failures. Tests on a random sample of 10 modified components resulted in the following times (in hours) between failures.

518 548 561 523 536 499 538 557 528 553

At the 0.05 significance level, test the claim that for the modified components, the mean time between failures is greater than 520 hours.

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