Oxygen levels in patients that contracted the virus is 9-0.'_Ehe standarddeviation of it is 3 units. A new drug developed by Gilead Pharamaceutical has been introduced. Some evidence shows it heals the patients, and some evidence shows it worsens it gnewpatients are tested with this drug, and their oxygen levels average is determined to be 83 Is the difference significant? Is this durg helpingpatients or worsening it