A researcher wants to know if a new chemotherapy drug will affect a patient's liver, and decides to conduct ALT analysis on the blood work of 11 patients getting ready to begin chemotherapy on the new drug. Normal ALT values typically range from 7 to 55 units. The researcher tests the ALT blood levels of the patients after a month of treatment. The test results before and after starting the therapy can be found above. Set up and interpret the results of a sign test at the alpha equals .05 level to determine if there is a difference in symptoms before and after treatment.