https://excellenttermpapers.com/wp-content/uploads/2020/07/logo-300x75.png00adminhttps://excellenttermpapers.com/wp-content/uploads/2020/07/logo-300x75.pngadmin1970-01-01 00:00:002020-10-14 15:10:40the ___ is the part of an experiment that is being tested and is used for comparison