In a test for significance of a Pearson correlation for a sample of n = 30 individuals,you determine the critical value by using df = 29.

Name: In a test for significance of a Pearson correlation for a sample of n = 30 individuals,you determine the critical value by using df = 29.
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The degrees of freedom (df) for a Pearson correlation test is calculated as n - 2, so for a sample of n = 30, df should be 28.

In a Test for Significance of a Pearson Correlation for a Sample