9 Assume that a simple random sample has been selected from a normally distributed population...
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9 Assume that a simple random sample has been selected from a normally distributed population and test the given claim Use either the traditional method or P value method as indicated Identify the null and alternative hypotheses test statistic critical value s or P value or range of P values as appropriate and state the final conclusion that addresses the original claim Choose the correct option based on the problem information 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 518 548 561 523 536 499 538 557 528 563 At the 0 05 significance level test the claim that for the modified components the mean time between failures is greater than 520 hours Use the P value method of testing hypotheses Choose the correct P value and conclusion based on the null hypothesis O0 01 P value 0 025 Reject Ho O0 05 P value 0 1 Reject Ho O0 01 P value 0 025 Fail to reject Ho 0 1 P value 0 2 Reject Ho 1 p
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