The director of research and development is testing a new medicine. She wants to know if there is evidence at the 0.02 level that the medicine relieves pain in less than 389 seconds. For a sample of 65 patients, the mean time in which the medicine relieved pain was 387 seconds. Assume the population standard deviation is 22.   Step 2 of 6 :   Find the value of the test statistic. Round your answer to two decimal places.

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