1) A college professor wants to determine the best way to present an important topic to his class. He has the following three choices: (1) he can lecture, (2) he can lecture and assign supplementary reading or (3) he can show a film and assign supplementary reading. He decides to do an experiment to evaluate the three options. He solicits 27 volunteers from his class and randomly assigns 9 to each of three conditions. In condition 1, he lectures to the students. In condition 2, he lectures and assigns supplementary reading, In condition 3, the students see a film on the topic and receive the same supplementary reading as the students in condition 2. The students are subsequenthy tested on the material. The following scores (in terms of percentage) were obtained: Condition 1 Condition 2 Condition 3 92 86 81 86 93 80 87 97 72 76 81 82 80 94 83 87 89 89 92 98 76 83 90 88 84 91 83 Is there a significant difference in the lesson presentation administered by the college professor at a 5% level of significance?