Pearson r to P-Value Calculator
This calculator converts Pearson correlation coefficients (r) to p-values, testing whether a correlation is statistically significant.
About Pearson Correlation
Pearson's correlation coefficient (r) measures the linear relationship between two continuous variables. It ranges from -1 (perfect negative correlation) to +1 (perfect positive correlation), with 0 indicating no linear relationship.
Interpreting r Values
- |r| = 0.00-0.19: Very weak
- |r| = 0.20-0.39: Weak
- |r| = 0.40-0.59: Moderate
- |r| = 0.60-0.79: Strong
- |r| = 0.80-1.00: Very strong
Null Hypothesis
H₀: ρ = 0 (there is no correlation between the two variables in the population)
When to Use
- Testing significance of a correlation
- Both variables are continuous
- Relationship is approximately linear
- No significant outliers
