Correlation Coefficient Calculator
StatisticsCalculate the Pearson correlation coefficient (r) between two sets of five paired values.
Correlation Coefficient (r)
Pearson's r, ranging from -1 (perfect negative) to +1 (perfect positive correlation).
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Frequently Asked Questions
What does the correlation coefficient mean?
Pearson's r measures the strength and direction of a linear relationship between two variables. A value near +1 means a strong positive relationship, near -1 means a strong negative relationship, and near 0 means little to no linear relationship.
Does correlation mean causation?
No. A strong correlation only shows that two variables move together — it does not prove that one causes the other. Other factors or coincidence could explain the relationship.
What is considered a strong correlation?
As a general guide, |r| above 0.7 is considered strong, 0.3 to 0.7 is moderate, and below 0.3 is weak, though interpretation varies by field.
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