Applicants for a Particular Job, Which Involves Extensive Travel in Spanish

question 52

Essay

Applicants for a particular job, which involves extensive travel in Spanish speaking_
countries must take a proficiency test in Spanish. The sample data below were obtained in a
study of the relationship between the numbers of years applicants have studied Spanish (x)
and their score on the test (y). $\begin{array}{rrrrrrrrrrr}\hline x & 3 & 4 & 4 & 2 & 5 & 3 & 4 & 5 & 3 & 2 \\\hline y & 57 & 78 & 72 & 58 & 89 & 63 & 73 & 84 & 75 & 48 \\\hline\end{array}$
The regression equation $\hat { y } = 31.55 + 10.90 x$ was obtained. Construct a residual plot for the data.

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Definitions:

Structure

Refers to the arrangement of atoms within a molecule or the arrangement of residues in a biological macromolecule, determining its shape and function.

Glycine

The simplest amino acid, with the chemical formula NH2CH2COOH, used in the body to make proteins.

Amino Acid

Organic compounds that serve as the building blocks of proteins, containing both amino (-NH2) and carboxylic acid (-COOH) functional groups.

Polypeptide

A molecule consisting of a chain of amino acids linked by peptide bonds, and is the building block of proteins.