An educator wishes to study the effects of sleep deprivation on the ability to concentrate. He decides to study the students in a calculus class. Before the start of the class, each student is asked about the number of hours slept the previous night. Each student's eye movement is then tracked throughout the lecture. The amount of time is recorded whenever the student is not focused on either the instructor or taking notes. This is an example of:
A)an observational study.
B)a sample survey.
C)a randomized experiment.
D)a matched pairs study.

Question

Quizplus · Accepted Answer

This is an observational study because the educator observes and records behaviors or outcomes without manipulating any variables or assigning treatments to the participants.

An Educator Wishes to Study the Effects of Sleep Deprivation