I If the Coefficient of Correlation Is 0

question 66

Multiple Choice

i. If the coefficient of correlation is 0.80, what is the coefficient of determination?
ii. What is a measure of the scatter of observed values around the regression line called?
iii. If the correlation between sales and advertising is +0.6, what percent of the variation in sales can
Be attributed to advertising?

• A) 0.4; standard deviation; 0.3.
• B) 0.64; standard error of the estimate; 36%.
• C) 0.64; standard error of the estimate; 60%.
• D) 0.08; variation; 36%.
• E) 0.4; standard error of the estimate; 60%.

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Definitions:

Lamarck's

Pertains to Lamarckism, a theory of evolution that emphasizes the inheritance of acquired characteristics.

Darwin's Mechanism

A theory proposed by Charles Darwin that describes the process of natural selection as the mechanism by which evolution takes place.

Modern Synthesis Theory

A framework that merges Darwinian evolution with Mendelian genetics, explaining how evolutionary processes like natural selection act on genetic variation.

Amino Acid Substitutions

Changes in the protein sequence where one amino acid is replaced by another, potentially altering protein function or stability.