The Annual Income of Residents in a Certain County Is

question 2

Multiple Choice

The annual income of residents in a certain county is Normally distributed, with a mean of $42,000 and a standard deviation of $10,000. What is the probability that a randomly chosen resident has income over $52,000?

• A) 16%
• B) 32%
• C) 50%
• D) 68%

---

Definitions:

Great Migration

The movement of over six million African Americans from the rural Southern United States to urban areas in the North and West, from approximately 1916 to 1970, in search of better economic opportunities.

Prohibition Movement

A social and political campaign in the United States aiming to ban the manufacture, sale, and consumption of alcoholic beverages, which led to the 18th Amendment and Prohibition era from 1920 to 1933.

Trenchfoot

A medical condition caused by prolonged exposure of the feet to damp, unsanitary, and cold conditions, commonly experienced by soldiers in trenches.

Shell-Shock

An old term used to describe the psychological trauma suffered by soldiers during war, now more commonly referred to as post-traumatic stress disorder (PTSD).