Exhibit 8-3 A Random Sample of 81 Automobiles Traveling on a Section

question 45

Multiple Choice

Exhibit 8-3
A random sample of 81 automobiles traveling on a section of an interstate showed an average speed of 60 mph. The distribution of speeds of all cars on this section of highway is normally distributed, with a standard deviation of 13.5 mph.
-Refer to Exhibit 8-3. The value to use for the standard error of the mean is

• A)13.5
• B)9
• C)2.26
• D)1.5

---

Definitions:

Glucose

A simple sugar that serves as the primary source of energy for the body's cells.

Self-Control

Self-control is the ability to regulate one's emotions, thoughts, and behaviors in the face of temptations and impulses, aiming for long-term goals.

Serotonin

The “feel good” neurotransmitter, low levels of which have been linked to aggression and violence in both animals and humans.

Depression

A disorder impacting mental wellness, defined by ongoing low spirits or a disinterest in normal tasks, significantly affecting day-to-day living.