An experiment cannot attempt to demonstrate, control unwanted variables, or interpret findings, nor can tables and figures compare (all of these can, however, show or indicate). Use a pronoun or an appropriate noun as the subject of these verbs. I or we (meaning the author or authors) can replace the experiment.
Publication Manual of the American Psychological Association, 6th ed., p. 69
Pour tous ceux qui s’obstinent à croire que la conjugaison à la première personne est interdite dans les articles scientifiques…