An Air Quality Index Reading of 105 Means the Air

question 62

Multiple Choice

An Air Quality Index reading of 105 means the air quality is considered

• A)good,posing little or no risk to sensitive groups.
• B)acceptable for all but the most highly sensitive groups.
• C)unhealthy for sensitive groups,including older adults and children.
• D)very unhealthy for all people,resulting in a public health alert.

---

Definitions:

Degrees Of Freedom

The number of independent values or quantities which can be assigned to a statistical distribution or a system without violating any constraints.

Multiple Regression

A statistical method that predicts the behavior of a dependent variable based on two or more independent variables.

Estimated Regression

A statistical method for estimating the relationships among variables, often used to predict the value of a dependent variable based on values of independent variables.

SSR

Sum of Squares due to Regression, a statistical measure used to evaluate the variance in the dependent variable that is predictable from the independent variable(s).