kari plans to sample 20 people of a population that contains 100 students. she wants to determine how many…
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
Answer
Brief Explanations:
A random sample should be representative of the entire population without bias. The first option (first 20 students arriving at school) may have bias as early - arrivers may have different wake - up times. The second option (all 20 boys on swim team) is a non - representative subgroup. The fourth option (last 20 people in line for breakfast) may also have bias as those in line late may wake up later. Selecting 5 students from each of 4 homeroom classes spreads the sample across different groups in the school, reducing bias.
Answer:
5 students out of each of the 4 homeroom classes