Reasoning Behind Non-Random Sample Selection

Tall students generally attend more classes. (correct)

There is nothing wrong with choosing the four tallest students.

Tall students are always the most attentive in class.

Tall students generally sit together.

It may favor certain characteristics like attentiveness or health. (correct)

There is nothing wrong with choosing based on height or seating position.

It guarantees a truly random sample.

It ensures a diverse mix of students.

Students sitting in the front row are always healthier.

Students in the back row often attend more classes.

Students in the back row might be late or inattentive. (correct)

There is nothing wrong with choosing the four students sitting in the back row.