Since 1990,average ________ Levels in the US Have Consistently Been

question 15

Multiple Choice

Since 1990,average ________ levels in the US have consistently been below the national standard.

• A)CO
• B)ozone
• C)PM10
• D)CO and PM10

---

Definitions:

Unvariate

A term likely intended as "univariate", which refers to statistical analysis that deals with only one variable at a time.

One-way ANOVA

A statistical test used to compare the means of three or more independent groups on a single measure to determine if there is a statistically significant difference among them.

Bi-modal Profile

A distribution with two different modes or peaks, reflecting two predominant values or characteristics within a dataset.

Distributions

In statistics, the way in which values of a variable are spread or dispersed across a range.