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 380 seconds For a sample of 18 patients the mean time in which the medicine relieved pain was 386 seconds with a standard deviation of 20 Assume the population distribution is approximately normal Step 1 of 3 State the null and alternative hypotheses Answer Ho Tables Keypad Keyboard Shortcuts