A student in cognitive psychology conducts a memory experiment examining recall for nonsense (e.g. sleemta) versus real words (e.g., sleeve). Half of his participants learn nonsense words while the other half study real words. He also decides to see how the environment where learning occurs affects recall, so half the students study in a very warm room while the remaining students study in a comfortable room. Mann-Whitney U O chi-square for independence O multiple regression Otwo-way independent-measures ANOVA