Describe Attribute Under Investigation Practice Test

A 6th-grade class is doing a study to answer: “How many hours of sleep did students get last night?” Students write their answers on a survey form. Which choice correctly describes the attribute under investigation, how it was measured, and the units?

A teacher wants to study: “How many hours of sleep do 6th graders get on a school night?” Which choice correctly describes the attribute under investigation, how it is measured, and the units?