Elaine believes that Chipotle guacamole consumption improves psychology exam performance. She randomly selects 100 first year students in a Columbia introductory psychology course. One hour before their first exam, she gives 50 of them guacamole and tortilla chips to consume, and the remaining 50 just tortilla chips to consume. After the exam, Elaine compares the average exam scores of the guacamole and tortilla chips group, to the tortilla chips only group. independent variable V [Choose ] Number of participants exam scores dependent variable Amount of tortilla chips consumed Amount of guacamole consumed Chipotle

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