Question

kari plans to sample 20 people of a population that contains 100 students. she wants to determine how many people wake up before 6 a.m. which sample is the most random? the first 20 students who arrive at school in the morning all 20 boys on the swim team 5 students out of each of the 4 homeroom classes the last 20 people in line for breakfast in the cafeteria

Explanation:

A random sample must represent the entire population without bias. The first 20 arrivals, swim team boys, and last 20 breakfast line people are biased (e.g., early arrivals may wake up early, swim team has demographic bias, late breakfast line may wake up later). Sampling 5 from each of 4 homerooms evenly spreads selection across the student population, minimizing bias.

Answer:

5 students out of each of the 4 homeroom classes