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Question: 6 the time to repair an electronic instrument is a...

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6. The time to repair an electronic instrument is a normally distributed random variable measured in hours. The repair time for 16 such instruments chosen at random are as follows: Hours 159 280 10 212 224 379179 264 222 362 168 250 149 260 485170 (a) You wish to know if the mean repair time exceeds 225 hours. Set up appropriate hypotheses for investigating this issue. (b) Test the hypotheses you formulated in part (a). What are your conclusions? Use a 0.05 (c) Find the P-value for this test.

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