Question

kareem wants to find the number of hours the average sixth - grader at his school practices an instrument each week. which is the best way kareem can get a representative sample?

• he can randomly survey 50 boys in the school.
• he can survey 30 students in the school band.
• he can randomly survey 50 sixth - graders in the school.
• he can survey 20 friends from his neighborhood.

Explanation:

A representative sample must match the population Kareem is studying: average sixth-graders at his school.

• Surveying only boys excludes girls, so it's not representative.
• Surveying school band students is biased, as they likely practice more than average sixth-graders.
• Surveying neighborhood friends does not guarantee they are sixth-graders at his school.
• Randomly surveying 50 sixth-graders at his school directly targets the exact population, ensuring a representative sample.

Answer:

He can randomly survey 50 sixth-graders in the school.