The Pearson product-moment correlation for two variables, fear of embarrassment and anxiety just before making an oral presentation, is r = .78, with a coefficient of determination of 0.6084
This means that what percentage of anxiety just before making an oral presentation can be attributed to fear of embarrassment?
a. About 0.61%
b. About 61%
c. About 0.78
d. About 78%
ANS: B
One can also assess the magnitude of association by obtaining the coefficient of determination for the Pearson correlation. Computing the coefficient of determination simply involves squaring the r value. The r2 (multiplied by 100%) represents the percentage of variance shared between the two variables. In other words, the coefficient of determination explains how much of the change in value of one variable can be attributed to the fluctuation in value of the other variable.
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