I If There Is Absolutely No Relationship Between Two Variables

question 129

Multiple Choice

i. If there is absolutely no relationship between two variables, what will Pearson's r equal? ii. If the coefficient of correlation is 0.80, what is the coefficient of determination?
iii. If the coefficient of determination is 0.81, what is the coefficient of correlation?

• A) zero (0); 0.64; 0.9 or -0.9.
• B) zero (0); 0.64; 0.09.
• C) one (1); 0.64; 0.6561.
• D) one (1); 0.64; 0.9 or -0.9.
• E) zero (0); 0.8944; 0.6561.

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Definitions:

Predictive Validity

The degree to which a test or measure predicts future performance or outcomes.

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The extent to which a score on a scale or test predicts future performance on a related task or identifies a particular outcome.

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