Cheryl wants to find the number of hours seventh-graders do homework each week. There are 297 girls and boys in seventh grade. Which is the best way for Cheryl to get a representative sample without spending too much time? A.) She can survey 15 of her friends in the school. B.) She can survey every sixth-grade student in the school. C.) She can randomly survey 50 girls in the entire school. D.) She can randomly survey 50 seventh-graders in the school.
Surveying 50 girls would include other grades outside of seventh grade and would not include boys. This would not be a representative sample of the population and would lead to invalid results.
