A Least Squares Estimated Regression Line Has Been Fitted to a Set

question 28

Multiple Choice

A least squares estimated regression line has been fitted to a set of data and the resulting residual plot is shown. Which is true?

• A) The linear model is appropriate.
• B) The linear model is poor because some residuals are large.
• C) The linear model is poor because the correlation is near 0.
• D) A curved model would be better.
• E) A transformation of the data is required.

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Definitions:

Acetone

A volatile, colorless liquid used as a solvent and an antiseptic, known chemically as propanone with the formula (CH3)2CO.

Hybridization

The concept of mixing atomic orbitals to create new hybrid orbitals for bonding, explaining the geometry of molecular structures.

Nitrogen Atom

An atom of the element nitrogen, which has the chemical symbol N and is essential for all living organisms as it is a key component of amino acids and nucleic acids.

CCC Bond Angle

The angle between three carbon atoms in a molecular structure, which can vary depending on the specific geometry of the molecule.