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Correlation coefficient definitionPearson's correlation coefficient (r), expresses the degree of linear relationship between two variables measured from the same individual. Pearson's r values can range between -1.00 to +1.00. A correlation coefficient of +1.00 signifies a perfect positive relationship, while -1.00 shows a perfect negative relationship. The smallest correlation is zero. |
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Correlation coefficient formulaOne formula for Pearson's r equation is: r = Sum(ZxZy) / N which indicates that Pearson's r is equal to the average crossproduct of the variables in standardized form. |
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Correlation significancePearson's r can be assessed for significance using a standard F test. |
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