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The director of research and development is testing a new

The director of research and development is testing a new medicine. She wants to know if there is evidence at the 0.05 level that the medicine relieves pain in more than 379 seconds. For a sample of 12 patients, the average time in which the medicine relieved pain was 387 seconds with a standard deviation of 21. Assume the population distribution is approximately normal.

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Basic Statistics: The director of research and development is testing a new

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