Question

maria wants to determine which student is favored for president of the student council. which of the following samples are biased and not random? select all that apply. surveying the boys in the freshman class. surveying every other student in the cafeteria. surveying all the students in her math class. surveying 20 students from each grade at random. surveying the students in the chess club.

Explanation:

A random sample should represent the entire student - body population. Surveying only boys in the freshman class is biased as it excludes girls and other grades. Surveying all students in her math class is biased as it only represents one class. Surveying students in the chess club is biased as it only represents a particular extracurricular group. Surveying every other student in the cafeteria and 20 students from each grade at random are more likely to be representative samples.

Answer:

A. Surveying the boys in the freshman class.
C. Surveying all the students in her math class.
E. Surveying the students in the chess club.