2. A researcher postulates that less sleep will lead to more aggression in adults. She recruits a random mixed sample of 75 college-aged (39 male and 36 female students) from the science and technology department at the local university. She divides the students into three groups: some people sleep 4 hours per night, some people sleep 2 hours per night and some people sleep at least 7 hours for five days. She then monitors their behavior during basketball games played among participants each day; noting aggressive behavior, such as swearing/name calling; pushing/shoving; belligerent stances/gestures; and hostile or uncompromising demeanor.

A) Type of Hypothesis:

B) What is the IV?

• What is the Unit of Measurement of IV?
• What is the Level of Measurement of IV?

C) What is the DV?

• What is the Unit of Measurement of DV?
• What is the Level of Measurement of DV?

3. Do college students who have firm career goals achieve higher GPAs than from those who do not have firm career goals?

• a null hypothesis.
• a non-directional hypothesis.
• a directional hypothesis.

5. The critical value is measured against the hypothesis.

• a) True
• b) False

6. The John Henry Effect is when people try harder and perform better when they are being observed.

• a) True
• b) False

8. An athletic program director hypothesizes that high school sports build character.

• A) Type of Hypothesis:
• B) IV:
• C) DV:

9. A researcher suspects that listening to classical music will make people feel more calm and relaxed (as measured by heart rate). He has one group of 25 adults listen to classical music for one hour. He has another group of 20 adults sit in a quiet room for one hour (i.e they hear no music). After one hour, he monitors the heart rate of each participant to measure their level of relaxation.

• A) Type of Hypothesis:
• B) IV:
• C) DV:
• D) Name the population:
• E) Name the sample:

10. Dropout rates are higher for students who come from low socioeconomic backgrounds than for students from high socioeconomic backgrounds.

• A) Type of Hypothesis:
• B) IV:
• C) DV: