A Professor Is Interested in Surveying the Students of a College

question 37

Multiple Choice

A professor is interested in surveying the students of a college he divides up the students based on the major they have chosen. He then selects students randomly from each major while keeping the overall distribution of majors the same. What type of sampling has he just conducted?

• A) simple random sampling
• B) snowball sampling
• C) disproportional stratified sampling
• D) proportional stratified sampling

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Definitions:

Sleep Terror Disorder

Disorder of arousal in which the individual screams, sweats, and has a racing heart during NREM sleep; the person cannot be easily wakened and usually does not remember the episode on awakening.

Nightmare Disorders

A sleep disorder characterized by frequent and vivid nightmares, often resulting in distress or impairment in social or occupational functioning.

REM Sleep

Rapid Eye Movement sleep; a unique phase of sleep characterized by rapid movement of the eyes, dreaming, and increased brain activity.

Shift Work Type

A work schedule that consists of hours different from the traditional 9 am to 5 pm, often involving evening or night shifts, early morning shifts, and rotating shifts.