A Class of 30 Introductory Statistics Students Took a Quiz

question 19

Multiple Choice

A class of 30 introductory statistics students took a quiz worth 100 points. The standard deviation of the scores was 0. What must be true about the students' scores?

• A)The mean, median, and mode must all be 0.
• B)Every student received the same score.
• C)Every student scored 100 on the quiz.
• D)There was an error in the calculation for standard deviation.

---

Definitions:

PNS

The Peripheral Nervous System, which includes all the nerves that lie outside the brain and spinal cord.

Reticular Formation

Midbrain area in which nuclei and fiber pathways are mixed, producing a netlike appearance; associated with sleep–wake behavior and behavioral arousal; also called the reticular activating system (RAS).

Sleep

A naturally recurring state of mind and body characterized by altered consciousness, relatively inhibited sensory activity, and inhibition of nearly all voluntary muscles.

Orienting Responses

The instinctive redirection of attention toward a new or important stimulus, often involving physical positioning toward the stimulus.