Question: An educational psychologist teaches a large introductory course in which students also participate in smaller discussion sections. He decides to experiment with different ways to conduct the discussion sections and assigns the 120 students at random to four equal sections, each taught by a different method. At the end of the course, the psychologist wants to use the students’ final examination scores to assess whether the teaching method used affected how well the students succeeded at the end of the course. What test should he use and why

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