What does r mean?
r = 1: perfect positive, r = -1: perfect negative, r = 0: no linear relationship
Calculator
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Results
Correlation (r)
0.775
Strong correlation
Analysis
Interpretation of the current calculator output
Calculation Summary
The current inputs have been processed for the correlation coefficient calculator. Review the results panel for the computed output and use the charts tab to compare the current values visually.
How to Read It
The main result shows the direct answer for your current inputs. Supporting sections below explain the method, example, and common questions so the result is easier to interpret.
How to Use
Step-by-step instructions
- 1Enter comma-separated X values.
- 2Enter comma-separated Y values.
- 3View correlation coefficient.
Pearson Correlation
Measures linear relationship between two variables.
r = Σ(x-x̄)(y-ȳ) / √[Σ(x-x̄)² Σ(y-ȳ)²]Variables:
rCorrelation coefficient (-1 to 1)Example
Example
Inputs:
X:1,2,3,4,5
Y:2,4,5,4,5
Steps:
- 1.Calculate means
- 2.Calculate covariance and variances
- 3.r = cov / (sd_x × sd_y)
Result:
r value