![]() If there was a strong, positive association, we could say that more time spent revising was associated with higher test performance. A value of 0 (zero) indicates that there is no relationship between the two variables.įor example, you could use a Pearson's correlation to understand whether there is an association between test performance and revision time (i.e., your two variables would be "test performance", measured as the exam mark achieved, and "revision time", measured in hours per week). ![]() Its coefficient, r, indicates the strength and direction of this relationship and can range from -1 for a perfect negative linear relationship to +1 for a perfect positive linear relationship. The Pearson product-moment correlation, often shortened to Pearson correlation or Pearson's correlation, is used to assess the strength and direction of association between two continuous variables that are linearly related. Pearson's correlation using Minitab Introduction ![]()
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