Dioxins Are a Class of Long-Lived and Highly Toxic Pollutants

question 25

Multiple Choice

Dioxins are a class of long-lived and highly toxic pollutants.The topsoil concentration in parts per million (ppm) are shown in the table below as a function of distance from the dump.
Create an appropriate model to re-express the concentration (ppm) .Then determine the regression equation and correlation coefficient for the re-expressed data.Round all figures to 4 decimal places.

• A)Re-expression: ;y = .0012x + 0.0218,r = 0.9985
• B)Re-expression: ;y = .0012x + .0500,r = 1
• C)Re-expression: ;y = .0012x + 0.0233,r = 0.9970
• D)Re-expression: ;y = .0012x + 0.0251,r = 0.9928
• E)Re-expression: ;y = .0012x + 0.0277,r = 0.9873

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Definitions:

Open Sentence

In predicate logic, a statement with a free variable.

Variable

1. In symbolic logic, a symbol that stands for some, but any, unnamed individual thing; 2. In statistics, a trait regarded as a generic attribute that can exist in different degrees (values).

Closed Sentence

In predicate logic, a statement in which every variable is bound by a quantifier.

Variable

An element, feature, or factor that is liable to vary or change, often used in mathematics, statistics, and scientific experiments to represent quantities or qualities that can assume different values.