1. Assume a researcher wants to understand more about how music affects learning. He gets approval from the principal of a neighbouring elementary school to utilize the two third-grade classrooms there. According to standardized exams, grade point averages, and staff assessments, the two classes' skill levels are remarkably similar. For a semester, the researcher played soft classical music in one class. The other class doesn't have any music playing. At the conclusion of the semester, he discovers that although though there are no other differences between the two classes, the class where the music was played had a significantly higher average in math than the other class. What population, if any, may the findings of this study be applied to in general? What specically might the researcher say regarding music's impact on learning? 2. A team of researchers wants to determine the attitudes of students about the recreational services available in the student organizations in the campus. The team stops the first 100 students it encounters on a street in the center of the campus and inguires about their organizational skills. What are some potential biases that could exist in this sample? 3. The Literary Digest, a well-known publication at the time, polled a sample of American voters in 1936 and asked them to choose between Franklin Roosevelt {Democrat} or Alf Landon (Republican) as their candidate for president in the approaching elections {Democrat}. The editors of the magazine chose a sample of 2,3?5,000 people from American listings of car and phone owners. The editors expected that Landon would win by a wide margin based on their ndings. In actuality, Roosevelt was the victor by a wide margin. What was incorrect about the study