Professor Boredom has noticed that students keep falling asleep during his lectures. He thinks that keeping the lights in the lecture hall on at their brightest level will help to keep students awake. He decides to give the same lecture to three groups of people. He holds one class session with bright lights, one class session with normal lighting, and one class session with dim lights. Professor Boredom has a teaching assistant count the number of sleepers at the end of each class.

1			What is Professor Boredom's hypothesis in this example?
			A)	Bright lights will keep more students awake in class than dimmer lights.
			B)	Lighting will have no effect on students' wakefulness.
			C)	Sleepy students prefer dimmer lights during class time than alert students.
			D)	Alert students prefer dimmer lights during class time than sleepy students.
2			The independent variable in the above experiment is
			A)	the number of sleeping students.
			B)	the level of light in the lecture hall.
			C)	the students' performance on a quiz covering the lecture material.
			D)	the number of pages of notes the students take during the lecture.
3			The dependent variable in the above experiment is
			A)	the number of sleeping students.
			B)	the level of light in the lecture hall.
			C)	students' performance on a quiz covering the lecture material.
			D)	the number of pages of notes the students take during the lecture.
4			After reading about research demonstrating that regular aerobic exercise improves a person's memory performance, Olga wonders if lifting weights daily would have the same effect. Olga has generated a(n)
			A)	theory.
			B)	construct.
			C)	hypothesis.
			D)	observation.
5			Which of the following is not a valid hypothesis?
			A)	Children cry more when their mothers leave a room than when their fathers leave a room.
			B)	College students like red jelly beans more than black jelly beans.
			C)	More car accidents occur on rainy days than on sunny days.
			D)	George Washington would have liked a Mac better than a PC.