Questions: At Liberty High School, researchers passed out surveys at lunch about drug use and asked students to turn them in on their way out. They might not get accurate results because: A. students at lunch might not be representative. B. it was not a random sample. C. All of these are correct. D. probably not all students returned them.

Solution Steps

The survey conducted at Liberty High School raises several concerns regarding its accuracy. The methodology involved passing out surveys during lunch, which may not capture a representative sample of the entire student body.

1. Non-representative Sample: Students present at lunch may not reflect the demographics or behaviors of all students at the school.
2. Lack of Random Sampling: The survey was not conducted randomly, as it targeted only those students who chose to attend lunch, potentially excluding others.
3. Non-response Bias: It is likely that not all students returned the surveys, which could lead to incomplete data and skewed results.

Given the identified issues, all the concerns about the survey's accuracy are valid. Therefore, the most comprehensive answer is that all the mentioned factors contribute to the potential inaccuracy of the survey results.

Final Answer