About Two-Thirds of U.S.electricity Is Generated From

question 67

Multiple Choice

About two-thirds of U.S.electricity is generated from:

• A) hydroelectric.
• B) petroleum.
• C) nuclear energy.
• D) coal and gas.

---

Definitions:

Correlational Studies

Research methods that examine the relationship between two or more variables to understand how they may influence one another.

Experimental Design

A methodology based on the scientific method that aims to ensure the validity and reliability of experimental results through control and randomness.

Positive Correlation

A relationship between two variables where if one variable increases, the other one also increases.

Epidemiology

A branch of medicine that investigates the various factors that contribute either to positive health or to the frequency and distribution of a disease or disorder.