If IQ Scores Are Normally Distributed,having a Mean of 100

question 46

Multiple Choice

If IQ scores are normally distributed,having a mean of 100 and a standard deviation of 15,approximately what percentage of people have IQ scores somewhere between 70 and 130?

• A) 34
• B) 50
• C) 68
• D) 95

---

Definitions:

Toll Road

A toll road is a public or private roadway for which a fee is assessed for passage. It generates revenue used for road construction, maintenance, or other transportation expenses.

Clean Air

Refers to the state of the atmosphere when it is free from pollutants and contaminants, enhancing environmental health and quality of life.

Too Little Consumption

A situation where individuals or the economy as a whole are consuming less than optimal, possibly leading to underutilization of resources and a decrease in economic wellbeing.

Nonexcludable

A characteristic of public goods where it is not feasible to exclude individuals from using the good, leading to potential free-rider problems.